Write a note on structure of mammary glands.
$\Delta$ It is spread on pectorialis major muscles.
A diagrammatic sectional view of Mammary gland
Mammary gland is a modified sweat gland.
A functional mammary gland is characteristic of all female mammals.
It is a paired structure that contain glandular tissue and variable amount of fat.
Externally each breast is a raised structure and nipples are located in the middle.
- Nipple is covered with light pink or light brown coloured skin having pigments. It is called areola.
The glandular tissue of each breast is divided into $15-20$ mammary lobes containing clusters of cells called alveoli.
- The cells of alveoli secrete milk which is stored in the cavities of alveoli.
- The alveoli open into mammary tubules.
$\Rightarrow$ The tubules of each lobe join to form a mammary duct.
$\Rightarrow$ Several mammary ducts join to form a wider mammary ampulla which is connected to lactiferous through which milk is sucked out.
$\Rightarrow \quad$ More information :
$\rightarrow$ Accessary reproductive gland in females.
$\Rightarrow$ The genital pore covers paraurethral glands and ducts of Bartholin's glands.
Vaginal orifice, urethral orifice and clitoris are protected by
$A$ : Vaginal orifice is partially covered by a membrane called the hymen.
$R$ : It is made up of thick layer of smooth muscle.
Match following columns :
Column $- I$ | Column $- II$ |
$(a)$ Endometrium | $(p)$ The most external layer |
$(b)$ Myometrium | $(q)$ Help in collection of the ovum after ovulation |
$(c)$ Fimbriae | $(r)$ Fertilised ovum is installed here |
$(d)$ Perimetrium | $(s)$ Thick layer of smooth muscle |
The following diagram refers to the female reproductive system of human. Identify $A$ to $F$
With a suitable diagram, describe the organisation of mammary gland.