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This says that all living things are made of cells, that cells are the basic unit of structure and function and that cells only come from other cells.
cell division in which the nucleus divides into nuclei containing the same number of chromosomes
adult stem cell
a cell present in adult tissues that generates replacements for nondividing differentiated cells
embryonic stem cell
an undifferentiated cell, taken from an embryo, that has the potential to give rise to various other cell or tissue types
an undifferentiated plant cell that can divide and differentiate to form specialized cells
The intake of food to physically and chemically break it down into nutrient molecules that can be absorbed and transported by the circulatory system, as well as the removal of solid waste
west nile virus
infection is transmitted by mosquitoes and is relatively new to the United States and can cause flu-like symptoms that can result in encephalitis
The protective covering of plants; generally a single layer of tightly packed epidermal cells covering young plant organs formed by primary growth.
tissue between the dermal tissue and vascular tissue of a non-woody plant that functions in photosynthesis, storage, and support
The internal transporting tissue in some plants that is made up of tubelike structures
1. Gas exchange - bringing oxygen into the body and getting rid of carbon dioxide
2. Diffusion - gases across a cell membrane
Importance of respiration
1. Gas exchange
2. Cell metabolism
3. Maintains PH of blood
4. Removes unwanted material from lungs
the ability of cells to make energy (from sugar, protein, fat) in order to carry out the function(s) of the cell
the process by which molecules move from an area of higher concentration to an area of lower concentration
Why is circulation important
1. Provides the cells with oxygen and nutrients
2. Removes waste
3. Transports disease-fighting agents
4. Controls body temperature
5. Provides a network to all cells in the body
tiny, thin-walled blood vessels that allow the exchange of gases and nutrients between the blood and the cells of the body
found in higher animals, the blood is pumped by the action of a specialized organ, the heart
open circulatory system
system in which blood is not always contained within a network of blood vessels
the break down of nutrients within a cell. Food particles are taken into the cell before being broken down by enzymes
digestion that takes place outside of the cell. Occurs within a tube arrangement (enters mouth and exits through the anus)
How does the stomach help in digestion
Muscular contractions of the stomach aids in the mechanical breakdown by mixing the food
the process of testing DNA to determine a person's risk of having or passing on a genetic disorder.
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