Functions
The skeletal system provides structural rigidity, protects internal organs, and serves as the main storage…
AAMC Outline
Thermoregulation: nasal and tracheal capillary beds; evaporation, panting
Thermoregulation occurs via the blood capillaries in the capillary beds of the nasal tract by…
Hormonal control of reproduction
The integrated action of hormones controls the male and female sexual development, and reproductive cycle…
Male and female reproductive structures and their functions
The gonads are the precursors of the genitalia in males that mostly include external (penis,…
Structure of antibody molecule
An antibody is formed of four polypeptide chains: two heavy and two light chains bound…
Tissues
The key primary lymphoid organs of the immune system include the thymus and bone marrow,…
Nodes of Ranvier: propagation of nerve impulse along axon
Nodes of Ranvier or myelin-sheath gaps are a type of specialized cell along the axons…
Myelin sheath, Schwann cells, insulation of axon
Schwann cells, specialized neuroglia cells, produce myelin sheath, which acts as insulation along the axon.…
Integration with endocrine system: feedback control
The endocrine system relies on feedback mechanisms to control the hormone levels in the circulatory…
Regulation by second messengers
For lipophobic hormones that cannot pass the cellular membrane, activity is mediated and amplified within…