Animal Physiology

Sertoli cells are specialized cells found in the seminiferous tubules of the testes. They play a crucial role in spermatogenesis by providing structural support, nourishment, and an optimal environment for developing germ cells. Additionally, Sertoli cells secrete factors that regulate the development of sperm and form the blood-testis barrier to protect germ cells from harmful substances.

The cranial meninges are protective layers that surround the brain and spinal cord. These include:
- Dura mater: The tough outer layer that protects the brain.
- Arachnoid: The middle layer, which is web-like and helps in cushioning the brain.
- Pia mater: The delicate inner layer that closely adheres to the brain’s surface.
Neurotransmitters, however, are not part of the meninges; they are chemical messengers used in the nervous system for communication.

Mesorchium is associated with the reproductive system as it supports testes in the male reproductive system. Uriniferous tubules are part of the excretory system, functioning in the kidney for filtration. Endocrine glands are associated with chemical coordination, releasing hormones to regulate bodily functions. Sinus venosus is part of the vascular system,functioning in the heart to collect deoxygenated blood.

• White blood cells help fight infections.
• Platelets are involved in blood clotting.
• Plasma is the liquid component of blood.

• Body balance
• Posture
• Coordination of muscles

• Cerebrum controls thinking, memory, and voluntary actions.
• Medulla oblongata regulates involuntary actions such as breathing and heartbeat.
• Hypothalamus regulates body temperature, hunger, and hormones.