Question

Какие типы молочных желез имеются у млекопитающих в зависимости от молочных протоков?

Answer 1

Тип А – молочная железа представлена преимущественно жировой тканью;

Тип В – молочные железы преимущественно представлены жировой тканью, отмечаются отдельные участки фиброзной и железистой ткани;

Тип С – молочные железы представлены как жировой, так и фиброзной и железистой тканью;

Тип D – молочные железы полностью представлены фиброзной и железистой тканью

Answer 2

Types of Mammary Glands in Mammals Based on Milk Ducts

Mammary glands in mammals can be classified into different types based on the arrangement of milk ducts. The types of mammary glands include:

1. Monotremes: - Monotremes, such as the platypus and echidna, are unique among mammals in that they lay eggs instead of giving birth to live young. Their mammary glands lack nipples and secrete milk through mammary patches on the skin.

2. Marsupials: - Marsupials, like kangaroos and koalas, have mammary glands that typically have teats, through which the young suckle. The number of teats varies among different species of marsupials.

3. Eutherians: - Eutherian mammals, which include placental mammals, have a wide variety of mammary gland types. The number and arrangement of mammary glands and nipples can vary greatly among different species. For example, humans typically have two mammary glands with one nipple on each breast, while other mammals may have multiple pairs of mammary glands and nipples.

In summary, the types of mammary glands in mammals vary based on the arrangement of milk ducts and can be classified into monotremes, marsupials, and eutherians, each with unique characteristics related to lactation and nursing offspring.