Acerca de este Curso
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100 % en línea

Comienza de inmediato y aprende a tu propio ritmo.

Fechas límite flexibles

Restablece las fechas límite en función de tus horarios.

Nivel principiante

Aprox. 37 horas para completar

Sugerido: 8 weeks of study; 4–5 hours/week...

Inglés (English)

Subtítulos: Inglés (English)

Programa - Qué aprenderás en este curso

1 hora para completar

Course Orientation

The series of videos and readings provided here are aimed at introducing this course in Lactation Biology. Course organization is described. Requirements for participation in the course are summarized. And, opportunities for learners to engage in the course content, as well as with each other, are indicated.

2 videos (Total 10 minutos), 5 readings, 2 quizzes
2 videos
Lactation Word Cloud2m
5 lecturas
Course Syllabus10m
About the Discussion Forums1m
Social Media5m
Updating Your Profile5m
Study Aid Activities Overview5m
2 ejercicios de práctica
Orientation Quiz5m
Demographics Survey26m
1 hora para completar

Module 1: Introduction to Lactation Biology

In this module, we will introduce some basic definitions of terms related to the biology of lactation, provide an overview of milk, and briefly introduce the phylogenetic organization and evolution of mammals. Learning the definitions will be important for establishing a baseline vocabulary that will help reduce confusion about topics presented in subsequent videos. Milk, a primary product of the lactation process, will be introduced in an effort to provide a foundation for later modules in which milk and milk composition are explored in greater depth. The series of videos about mammals collectively offer a brief overview of the wide spectrum of these animal species, as well as some thoughts on how lactation came to be an integral part of the reproductive strategy of those species.

8 videos (Total 58 minutos), 2 readings, 2 quizzes
8 videos
Definitions Part 27m
An Overview of Milk5m
How Much Milk?4m
Milk Products6m
Mammalian Evolution5m
Why Lactate?9m
2 lecturas
Module 1 Overview5m
Optional: Study Aids5m
2 ejercicios de práctica
Lesson 1-1 Quiz10m
Lesson 1-3 Quiz10m
4 horas para completar

Module 2: Mammary Gland Structure

One of the most fundamental requirements for understanding any aspect of biology is to appreciate the relationships that exist between form and function, or anatomy and physiology. In the case of lactation and the mammary gland, it is important to be able to visualize the various levels of mammary gland structure in order to understand how the mammary gland grows and functions. This module presents an overview of mammary gland anatomy and macrostructure using the dairy cow as our primary example. In addition, the tissue, cellular, and subcellular levels of mammary structure are presented. The module provides a conceptual foundation that will allow you to individually explore mammary gland anatomy and microstructure in other mammalian species.

19 videos (Total 130 minutos), 2 readings, 5 quizzes
19 videos
Mammary Lobes6m
Simple vs Complex Glands4m
Mammary Anatomy at the Cow Side10m
Mammary Suspensory System9m
Median Suspensory Ligament2m
Structure of Teats and Cisterns6m
Supernumerary Teats4m
Mammary Blood System10m
Mammary Lymph System6m
Mammary Nervous System3m
Introduction to Mammary Microstructure6m
Microstructure - 2D and 3D8m
More on Lobules9m
Alveoli and Their Environment7m
Myoepithelial Cells5m
Mammary Cell Ultrastructure Part 18m
Mammary Cell Ultrastructure Part 25m
2 lecturas
Module 2 Overview5m
Optional: Study Aids5m
5 ejercicios de práctica
Lesson 2-1 Quiz10m
Lesson 2-2 Quiz12m
Lesson 2-3 Quiz10m
Lesson 2-4 Quiz10m
Week 1 Quiz30m
5 horas para completar

Module 3: Milk Composition

Milk is the product of the lactation process. Such a simple statement does not come close to doing justice to the complex nature of this biological fluid. In this module, we explore the major components of milk, as well as provide a basis for understanding milk as a product that we purchase in a store. Mechanisms of synthesis of milk components are introduced. And, several videos include discussions of the nature of differences in milk composition among mammalian species, including comparisons of cow milk with human milk.

27 videos (Total 178 minutos), 2 readings, 7 quizzes
27 videos
Milk Components Demo2m
Perspectives on Milk Composition7m
Milk Under the Microscope5m
Major Milk Fractions5m
From Cow to Store10m
Total Solids4m
Lactose Intolerance4m
Lactose Synthesis8m
Milk Protein4m
Casein Demo5m
Whey Proteins9m
Milk Protein Synthesis8m
Milk Fat4m
Fatty Acids6m
Milk Fat - Species Comparisons5m
Milk Fat Synthesis15m
Milk Minerals10m
Milk Vitamins2m
Cells in Milk6m
More on Milk Cells1m
Milk Bioactive Factors8m
Species Comparisons of Milk7m
Cow vs. Human Milk Composition5m
Wrapping Up Milk Composition4m
2 lecturas
Module 3 Overview5m
Optional: Study Aid5m
7 ejercicios de práctica
Lesson 3-1 Quiz10m
Lesson 3-2 Quiz10m
Lesson 3-3 Quiz10m
Lesson 3-4 Quiz10m
Lesson 3-5 Quiz10m
Lesson 3-6 Quiz10m
Week 2 Quiz30m
3 horas para completar

Module 4: Mammary Gland Development

The tissue that we know of as the mammary gland (or udder or breast) may appear as relatively uncomplicated compared with some internal organs such as the heart or brain. The gland is outside the body wall, has a nipple or teat in most species, and has a series of ducts by which milk that is produced in microscopic blind tubes can be expressed from the gland. How can such a gland develop and what regulates that development? It turns out that the initial stage of development occurs extremely early in the fetal development of the animal. It then proceeds through a series of developmental phases, many of which are closely linked with the reproductive functioning of the animal, and eventually leading to the time when the gland is producing milk. Furthermore, the mammary gland is one of a few tissues that undergoes repeated cycles of development, functioning, regression, and redevelopment, again associated with the reproductive cycles of the animal. This module describes the various stages of mammary development and provides the framework for understanding how these stages relate to each other, as well as to the functionality of the gland.

11 videos (Total 79 minutos), 2 readings, 4 quizzes
11 videos
Fetal Stage - 26m
Fetal Stage - 36m
Prepubertal Stage - 17m
Prepubertal Stage - 23m
Postpubertal Stage7m
Development During Pregnancy - 12m
Development During Pregnancy - 26m
Development During Pregnancy - 35m
Bovine Mammary Development13m
2 lecturas
Module 4 Overview5m
Optional: Study Aid5m
4 ejercicios de práctica
Lesson 4-1 Quiz10m
Lesson 4-2 Quiz10m
Lesson 4-3 Quiz10m
Week 3 Quiz30m
5 horas para completar

Module 5: Mother & Neonate

The peripartum period, the time shortly before, during, and after giving birth, is a time of rapid changes in the mammary gland, the mother, and the neonate. Extensive physiological coordination occurs between the processes leading up to and giving birth, the formation of colostrum, the initiation of lactation in the mammary gland, and the subsequent removal of milk by the neonate. In this module, we explore how the mammary gland changes around the time of giving birth when the gland transitions from a non-lactating to a lactating state. Part of this transition is the production of colostrum, the first mammary secretion produced by the gland after giving birth. Another part of the transition is the changing regulation of mammary gland function from one being driven primarily by hormones associated with pregnancy and parturition to one where milk removal, by the neonate or milking machine, is the driving force in gland function after birth. In this module, we examine some basic characteristics of the neonate, how lactation is initiated (lactogenesis), and the formation and special components of colostrum (immunoglobulins) and their impact on the neonate.

17 videos (Total 124 minutos), 2 readings, 7 quizzes
17 videos
A Cow Calving3m
The Neonate8m
Lactogenesis & Its Stages7m
Secretory Differentiation8m
Secretory Activation & Lactose Synthesis7m
Hormonal Regulation5m
Comparative Hormonal Regulation7m
Prolactin - Sources4m
Prolactin - Control of Secretion5m
Prolactin - Other Regulation5m
Colostrum Composition12m
Immunoglobulins in Colostrum6m
Colostrum & the Neonate10m
Immunoglobulin Receptor6m
Mammary Transport of Immunoglobulin7m
Immunoglobulin Transport to the Neonate6m
2 lecturas
Module 5 Overview5m
Optional: Study Aid5m
6 ejercicios de práctica
Lesson 5-1 Quiz10m
Lesson 5-2 Quiz10m
Lesson 5-3 Quiz10m
Lesson 5-4 Quiz10m
Lesson 5-5 Quiz10m
Week 4 Quiz30m
5 horas para completar

Module 6: Lactation

In this module, we explore the many facets of lactation as a complex physiological process. We will find that removal of the milk in the gland is critical to continued production of that fluid. The interactions between milk removal, the systemic factors stimulating the gland to produce milk, such as several hormones, and the local factors that inhibit further milk secretion are examined. Some of the effects of milk removal, as well as the absence of milk removal, are discussed in this series of videos. The responses of the mammary gland to milk removal provide a means of understanding the impact of management practices on lactation.

27 videos (Total 214 minutos), 2 readings, 5 quizzes
27 videos
Systemic vs Local Regulation10m
Measurement of Milk Production7m
Prolactin - Nonruminants9m
Prolactin - Ruminants 16m
Prolactin - Ruminants 29m
Growth Hormone - Cows8m
Growth Hormone - Rats10m
Other Hormones9m
Feedback Inhibition of Milk Secretion10m
Frequency of Milk Removal5m
Cisternal vs Alveolar Milk Pools7m
Frequency of Milk Removal - Cows6m
Determinants of Milk Yield6m
Intensity of Milk Removal9m
Milk Stasis4m
Mammary Secretions During Involution10m
Mammary Tissue During Involution8m
Dry Period9m
Persistency & Relactation10m
Mammary Involution - Sows9m
Compensatory Milk Production9m
Lactational History - Cows3m
Lactational History - Sows5m
Lactational History - Rats6m
2 lecturas
Module 6 Overview5m
Optional: Study Aid5m
5 ejercicios de práctica
Lesson 6-1 Quiz10m
Lesson 6-2 Quiz10m
Lesson 6-3 Quiz10m
Lesson 6-4 Quiz10m
Week 5 Quiz30m
2 horas para completar

Module 7: Milk Ejection

This module introduces the physiological process known as the milk ejection reflex. The neural and endocrine pathways of this process are discussed, as is a broad overview of the hormone responsible for milk ejection, oxytocin. In addition, the consequences of ineffective milk ejection and ways that have been tried to manipulate the milk ejection process are presented.

15 videos (Total 95 minutos), 2 readings, 3 quizzes
15 videos
Neuroendocrine Reflex5m
Timing of Milk Ejection4m
Rise in Intramammary Pressure3m
Mammary Structure Changes During Ejection4m
Microstucture of Milk Ejection2m
Sources of Oxytocin10m
Other Functions of Oxytocin4m
Residual Milk8m
Disturbed Milk Flow9m
Manipulation of Milk Ejection6m
Inhibition of Milk Ejection6m
Species Comparisons9m
Milk Ejection Demo - Optional7m
2 lecturas
Module 7 Overview5m
Optional: Study Aid5m
3 ejercicios de práctica
Lesson 7-1 Quiz10m
Lesson 7-2 Quiz10m
Lesson 7-3 Quiz10m
3 horas para completar

Module 8: Atypical Lactation

We typically assume that development of the mammary gland and production of milk are closely regulated by and are coordinated with the reproductive functioning of the animal. Most often that is true. From the knowledge gained from other modules in this course, it is clear that mammary gland development and lactogenesis are heavily regulated by hormones. As it turns out, the presence of mammary gland-regulating hormones is not always directly associated with the reproductive status of the animal. If the hormone activity is present, regardless of its source, it may impact mammary gland development and function. The series of videos in this module presents an overview of what we are calling atypical lactation. That is when the mammary gland undergoes development and lactation in the absence of the usual physiological cues that we associate with the process, such as an animal giving birth.

7 videos (Total 74 minutos), 2 readings, 3 quizzes
7 videos
Elevated Prolactin14m
Relactation, Allosucking, Communal Nursing12m
Lactation in Males15m
2 lecturas
Module 8 Overview5m
Optional: Study Aid5m
2 ejercicios de práctica
Lesson 8-1 Quiz10m
Week 6 Quiz30m
6 horas para completar

Module 9: Mastitis

The mammary gland is an excretory gland, meaning that it produces a fluid that is secreted to the outside of the body. These secretions leave the gland through a series of ducts that eventually open to the outside of the skin. The presence of these openings not only means that the mammary secretion can leave the gland, it also means that microorganisms can enter the gland. When that happens, the gland may become infected and present as a disease known as mastitis. Mastitis is an inflammation of the mammary gland, the inflammation most commonly being caused by an infection by a pathogen. Mastitis is the most costly disease in dairy cattle, but is also prevalent in other species, including our own. We will examine many of the aspects of how this disease is manifested using the dairy cow as our primary example in this module. We will examine mastitis at the level of an individual cow, as well as at the whole herd level. And then to fully integrate and apply the knowledge gained about this disease, we will examine several real-life cases of herd-level mastitis problems faced by dairy producers.

19 videos (Total 189 minutos), 3 readings, 6 quizzes
19 videos
Milk Components5m
First Line of Defense6m
Inflammatory Response11m
Treatment & Control8m
Mastitis Syndromes11m
Mastitis Types7m
Contagious Pathogens7m
Environmental Pathogens6m
Other Pathogens5m
Mastitis at a Herd-Level8m
Contagious vs Environmental5m
Milking Procedure9m
Mastitis Example Case 120m
Mastitis Example Case 224m
Mastitis Example Case 319m
3 lecturas
Module 9 Overview5m
Optional: Study Aid5m
Mastitis Cases Answers5m
5 ejercicios de práctica
Lesson 9-1 Quiz10m
Lesson 9-2 Quiz10m
Lesson 9-3 Quiz10m
Lesson 9-4 Quiz10m
Week 7 Quiz30m
4 horas para completar

Module 10: Comparative Lactation

In this module, we provide a series of videos that expands what has already been learned in other modules about the basic principles of lactation biology to a range of mammalian species. These videos focus on these animals in their native state, as well as some that have been domesticated for use as dairy animals and domestic livestock. This module is optional.

21 videos (Total 188 minutos), 2 readings, 1 quiz
21 videos
Swine Lactation: Mammary Anatomy & Development10m
Swine Lactation: Milk Composition7m
Swine Lactation: Lactogenesis & Early Lactation11m
Swine Lactation: Milk Production7m
Swine Lactation: Milk Removal & Sucking Intensity8m
Swine Lactation: Milk Ejection9m
Swine Lactation: Mammary Involution8m
Swine Lactation: Prolactin & Lactation14m
Swine Lactation: Lactational History11m
Swine Lactation: Mastitis 19m
Swine Lactation: Mastitis 210m
Swine Lactation: Mastitis 36m
Elephant Lactation 111m
Elephant Lactation 210m
Dairy Goats: Farm Introduction7m
Dairy Goats: The Kids5m
Dairy Goats: The Does2m
Dairy Goats: Milking Parlor and Procedures5m
Dairy Goats: Cheese Introduction7m
Dairy Goats: Making Cheese11m
2 lecturas
Module 10 Overview5m
Solutions to Crossword Puzzles10m
1 ejercicio de práctica
End of Course Survey52m
4 revisionesChevron Right


consiguió un beneficio tangible en su carrera profesional gracias a este curso


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Principales revisiones sobre Lactation Biology

por MTMar 1st 2019

was great course would love to see a little more of human lactation in here to compare with. i enjoyed the corse just getting grading was slow.



Dr. Walter Hurley, PhD

Professor Emeritus
Department of Animal Sciences

Acerca de Universidad de Illinois en Urbana-Champaign

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