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Definition: an organ or tissue that synthesises and secretes a chemical messenger such as a hormone into the blood plasma.Examples: pituitary gland, thyroid gland (other relevant).

The right atrium, right ventricle, left atrium and left ventricle Deoxygenated blood enters the hearts right atrium via the superior and inferior vena cava, then is pumped to the right ventricle (through ...

During prophase 1, homologous chromosomes will pair up to form a bivalent, this is where crossing over can occur. Chromatids will twist around each other and will break and reform, resulting in crossing o...

Stem cells are undifferentiated cells that can give rise to different types of cells in the body from brain to muscle cells. Stem cells can be used to replace damaged or diseased cells with healthy ones. ...

The small intestine is an organ which absorbs the products of digestion (sugars and amino acids etc) into the blood. One of the primary functions of the small intestine is to act as a large surface for ab...