Term | Definition |
is the outer protective covering of a cell.It is called the plasma membrane and is considered semipermeable. | cell membrane |
is a semi fluid inside the cell but outside the nucleus. It is the site for all chemical reactions that take place in a cell. | cytoplasm |
are considered "little organs" and are structures that help a cell to function | organelles |
a mass in the cytoplasm that is considered the "brain" of the cell.It is separated from the cytoplasm by a nuclear membrane. | nucleus |
represents all living parts of the cell and includes the nucleus | protoplasm |
is located in the nucleus and made of DNA and protein.It is important to passing on the parents genes during reproduction | chromatin |
number of pairs of chromosomes a person has | 23 |
number of individual chromosomes people have | 46 |
considered the total mass of genetic instruction humans inherit from their parents | genome |
rod shaped organelle located throughout the cytoplasm and are considered the "powerhouses" of the cell | mitochondria |
a stack of membrane layers located in cytoplasm.produces , stores , and packages secretions from cells | golgi body |
are sites for protein synthesis and located on rough e.r | ribosomes |
oval round bodies in the cytoplasm that have digestive enzymes and destroy old cells,bacteria,etc. | lysosomes |
when a cell reproduces without the help of another cell it is called | asexual reproduction |
some specialized cells such as the brain never reproduce after birth | true |
muscle cells reproduce continuosly | false |
skin,blood,and intestinal cells reproduce continuosly | true |
is asexual reproduction which is used by most cells. | mitosis |
is the mass of cells that contains stem ells and is important to stem cell research and the process of reproducing sexually | blastocyst |
is the process by which sex cells reproduce | meiosis |
are joined similar cells that are mostly water,slightly salty,and can become dehydrated | tissues |
is the tissue that covers the surface of the body and includes the skin and nails | epithelial |
supporting fabric for organs and other body parts and can be soft or hard | connective |
the tissue that produces power and movement by contraction of muscle fibers | muscle |
large cavity located on the back of the body | dorsal |
large cavity located on the front of the body | anterior |
separates the body into a top and bottom half | transverse plane |
separates the body into a left and right half | median plane |
divides the human body into a front and back section | frontal |
outermost layer of skin made of smaller layers and protects the skin | epidermis |
the "true skin" layer that holds the hair,blood vessels,and oil glands | dermis |
innermost layer of skin that connects the muscle to skin | hypodermis |
second degree burns burn through.. | epidermis and dermis |
tissue or organ taken from one person and given to another | allograft |