The science which studies the structure of an organism.
The simplest unit of living matter that can maintain life and reproduce itself.
A state of equilibrium in which the internal environment of the body remains relatively constant.
The science which studies the movement of muscles.
A lengthwise place running from front to back dividing the body or any of its parts equally into right and left halves.
The science which studies the function of an organism.
A lengthwise plane running from front to back dividing the body or any of its parts into right and left sides.
A crosswise plane dividing the body or any of its parts into upper and lower sections.
Dorsal Cavity Contains:
Cranial cavity, Brain, Spinal cavity, Spinal cord. This cavity is bounded by the cranial and spinal bones.
Ventral Cavity Consists of:
Thoracic(chest cavity) and Abdominopelvic cavity
Interconnected membranes with spaces between them forming canals; has openings to the outside of the cell and is connected to certain other organelles and to the nuclear membrane.
Responsible for the synthesis of protein molecules.
Responsible for the synthesis of carbohydrate molecules for export from the cell.
Energy source of the cell. ATP synthesis "Powerhouse of the cell." Present in great numbers in muscle tissue.
Capable of breaking down and digesting molecules of protein and carbohydrates when their enzymes are released. White blood cells have a great number of lysosomes.
Help form a spindle that appears during mitosis(cell division)
Directs the activities of the cell; contains relatively large quantities of DNA.
Tiny hair-like projections of the cytoplasmic membrane located only in the small intestine to facilitate absorption by increasing surface area.
Small hair-like projections of the cytoplasmic membrane located in the respiratory system acting to propel mucous upward.
A single projection, such as found on a sperm cell allowing for propulsion of that cell.
Functions as a gateway through which substances enter and leave the cell. Specifically, oxygen and food molecules enter a cell by passing through this membrane, while carbon dioxide and other wastes leave through it.
Passive Transport Systems
A system in which movement occurs that does NOT require a direct expenditure of cellular energy.
Process by which molecules or ions scatter or spread themselves from regions of higher concentration to regions of lower concentration.
The diffusion of water(or any fluid) through a selectively permeable membrane. Their concentration on both sides of the membrane eventually becomes equal.
The diffusion of solutes through a selectively permeable membrane. It is the process where smaller molecules are separated from larger ones in a liquid.
Active Transport Systems
Requires the use of ATP. Uphill movement through a cell membrane, from an area of lower concentration to an area of higher concentration.
Cell Pump. Movement of molecules of ions against a concentration gradient.
Cell Drinking. Process by which cells engulf tiny droplets of liquid from their surroundings.
Cell Eating. Process by which cells engulf solid particles, such as bacteria and cellular debris.