Search over 10,000 free study notes

Deoxygenated blood enters at the vena cava. The right atrium receives the blood, and it then passes into the right ventricle. From there it goes to the lungs via the pulmonary artery. This brings the deoxyge...

First of all, respiration is not breathing. Respiration is combining oxygen and glucose to form energy (ATP) with carbon dioxide as a waste product. All living things respire in order to obtain energy to car...

Negative feedback is one of the ways the body maintains homeostasis. Homeostasis describes the body maintaining set internal conditions- for example the level of certain hormones in the body is kept in a nar...

When the external environment is hot, the temperature is detected by temperature receptors on the skin, which is transmitted to the brain via the sensory neurons. The brain sends the signals to the hypothala...

There are two main types of microscope: light microscopes are used to study living cells and for regular use when relatively low magnification and resolution is enough.