Adrenal gland :

The adrenal glands are present in pairs, one at the anterior part of each kidney. The adrenal gland is made of two kinds of tissues namely 
i. Adrenal medulla. 
ii Adrenal cortex. 

Parts of Adrenal gland :

1. Adrenal cortex : It is the outer part of the adrenal gland. It is further differentiated into three parts :

(a) Zona glomerulosa (Outer zone)

(b) Zona fasciculata (Middle zone)

(c) Zona reticulosa (Inner zone outer to adrenal medulla).

Hormones secreted - Adrenal cortex secretes the following three hormones derived from steroids :

(i) Aldosterone or mineralocorticoids.

(ii) Cortisol or glucocorticoids.

(iii) Sexcorticoids or androgens.

2. Adrenal medulla : It lies inner to cortex.

Hormones secreted- It secretes two hormones namely:

(a) Epinephrine

(b) Norepinephrine.