| A | B |
|---|
| atom | basic unit of chemical element |
| molecules | combination of atoms chemically bonded as one |
| organelles | any of a number of organized or specialized structures within a living cell |
| cells | the basic unit of a living organism |
| tissues | a group of cells with the same origin that serve a similar function |
| organ | self-contained group of tissues that performs a specific function in the body |
| organ system | group of organs that work together to perform a certain function in an organism ’s body |
| organism | a single individual, or being |
| connective tissue | blood, collagen, protein fibers, cartilage |
| muscular tissue | smooth, cardiac, skeletal |
| nervous tissue | nerves or neurons |
| epithelial tissue | skin, inside lining of organs, cover of organs |
| superior direction | above or top |
| inferior direction | below or under |
| anterior direction | in front or ventral |
| posterior direction | behind, rear or dorsal |
| medial | vertical line down the middle in bilateral organism |
| lateral | to either side of medial line |
| proximal | closest to trunk (head and torso) |
| distal | furthest from trunk (head and torso) |
| sagittal plane | anatomical boundary that exists between the left and right sides of the body |
| frontal plane | imaginary plane that runs through the body parallel to the surface of the frons (forehead) and perpendicular to the sagittal and transverse planes |
| transverse plane | imaginary dividing line that separates the anterior and posterior sections of the body |
| anatomy | the branch of science concerned with the bodily structure of humans |
| physiology | the branch of biology that deals with the normal functions of living organisms and their parts |
