Gas exchange in humans occurs in the lungs - microscopic structures called alveoli. Main Article: Explore How Gas Exchange In The Lungs Takes... View Article
In biology, excretion is the process where metabolic wastes are expelled from an organism. In humans, this process is carried out primarily... View Article
During strenuous exercises, the body will quickly deplete its oxygen supply. In order to keep up with the increased energy demands, our body... View Article
In biology, homeostasis refers to the ability to maintain a relatively stable internal state despite changes in the external environment. Humans,... View Article
The heaviest internal organ is the liver. If we were to look at the sections of the human body, then the trunk would be the heaviest part of the... View Article
Filtration is a biological/ chemical or physical operation which results in the separation of solid matter from a liquid - by letting the mixture... View Article
The term double circulatory system indicates that an organism has two separate circuits, resulting in the blood passing through the heart twice.... View Article
Cytokinins are a class of phytohormones. Please note - this term is not to be confused with Cytokines - these are proteins which play an... View Article
Cilia is a slender, hair-like organelle that primarily helps with locomotion. However, there are non-motile cilia, and these perform sensory... View Article
Chromosomes are found inside the nucleus of all lifeforms, from humans and animals to plants and even viruses. Chromosomes are essentially... View Article
Bloodstream is a term which describes the blood flowing through the body of an organism. In humans, blood flows through a complex network of... View Article
From a biological perspective, humans are classified under the order primates, and the genus Homo. Humans are also the only extant members of the... View Article
One of the best examples of osmosis is seen in the kidneys. Osmosis ensures that the molecules of wastes as well as excess water in the blood are... View Article
When breathing, the body receives fresh oxygen which enters the bloodstream through the process of diffusion. Read more by registering at... View Article
One of the most well-known examples of active transport in the human body is the uptake of glucose in the intestines. Read more by registering... View Article
In biology, absorption is the process where substances are assimilated (or absorbed) into the cells through osmosis or diffusion. In the human... View Article
A tissue is a group of cells that perform a common function and have similar structure. They usually work together as a unit, often forming... View Article
DNA is a chemical, a complex molecule carrying the essential genetic instruction. It is not considered to be alive even though it is vital for... View Article
DNA is the chemical name assigned to the molecule carrying genetic information in all entities that live. The 'D' in DNA corresponds to... View Article
