Endocrine System
Endocrine System consists of ductless glands that control, communicate, coordinate and integrate various functions of all the body organs by secretions of chemical messenger called hormones.
net
Hepatic portal System
All the portal veins that carry their contents into liver collectively constitute the Hepatic Portal System.
Human Excretory System
The process of removal of chemical waste (mainly nitrogenous) from the body is known as excretion and the organ system involved is called Excretory System.
Human Population
Population may be defined as a group of organisms belonging to one species which occupy a given area at a given time.
Blood Group
Blood group, also known as blood type, is a group of types of blood based on the presence and absence of blood group antigens in the surface (membrane) of the RBCs, and antibodies on the plasma.
Human Circulatory System
All the parts of the body that help in the transportation of various materials in the body, collectively constitute the Circulatory System.