CNA Key terms - chapter 7
Terms
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- artery
- A blood vessel that carries blood away from the heart
- capillary
- A tiny blood vessel; food, oxygen, and other substances pass from the capillaries to the cells
- cell
- The basic unit of body structure
- digestion
- The process of physically and chemically breaking down food so that it can be absorbed for use by the cells
- hemoglobin
- The substances in red blood cells that carries oxygen and gives blood its color
- hormone
- A chemical substance secreted by the glands into the bloodstream
- immunity
- Protection against a disease or condition; the person will not get or be affected by the disease
- menstruation
- The process in which the lining of the uterus breaks up and is discharged from the body through the vagina
- metabolism
- The burning of food for heat and energy by the cells
- organ
- Groups of tissues with the same function
- peristalsis
- Involuntary muscle contractions in the disgestive system that move food through the alimentary canal
- respiration
- The process of supplying the cells with oxygen and removing carbon dioxide from them
- system
- Organs that work together to perform special functions
- tissue
- A group of cells with similar functions
- vein
- A blood vessel that carries blood back to the heart