#Histology
Digestive system
Tongue: papillae
(الملزمة الاولى مال الdigestive system)

Tongue papillae

#biochemistry
RAAS system
(Renin - Angiotensin - Aldosterone - System)
(الملزمة الرابعة مال الendocrine)

#biochemistry
Hormonal regulation of male reproductive system
(الملزمة الرابعة مال الendocrine)

Sertoli "Nurse" cells

#biochemistry
Goiter, thyroid stuff
(الملزمة الرابعة مال الendocrine)

Goiter is caused by:

- Iodine deficiency.
- Overproduction of TSH, without producing Thyroid hormones