Nervous system : : Central Nervous System Brain Spinal cord .

: Peripheral Nervous System : Cranial Nerves. Spinal Nerves .

Types of Neurons1- Sensory neurons ( ) .2- Motor Neurons ( ) . . 3 - Association Neurons 99 %

Neuron : Nerve cell Body Axon . . . .

( ) The Synapses () : - Terminal Bouton . .2- synaptic Cleft Gap 3- Postsynaptic cell dendrit

Endocrine system

Hormones : ( ) .

6- The Gonads .1 The testes 1 spermatogenesis ( ) . 2 steroidogenesis .2- The ovaries Ovary ( ).

Reproductive system (Reproduction) : 1- (Asexual reproductioon) . 2- (Sexual reproduction) . : - :Testes 5 2,5 10-15. (Tunica Albuginea) (200 ) 1-3 (Seminiferous tubules) (Spermatogenesis) (Interstitial cells of leydig ) (Testosterone). .

- : : - - - (Rete testes) : (Rete testes) (Epididymis)

(Epididymis) 6 1 . .

(Vas differens ) : 45 . . (Oxytocine) ( ). (Spermatic cords) : . (Urethera)

. (Urethera): . .

- (Ovaries) - (Oviducts) - (Uterus) - (Vagina)