levels of organization
The basic structural and functional unit of living
cell
The group of organs that work together to circulate blood through the body, supply oxygen and nutrients, and remove waste
Circulatory System
A group of organs that provide mechanical movement and generate warmth for the body
muscular system
A lipid barrier that encloses the cytoplasm and controls what enters and exits the cell
cell membrane
The organelle that functions in energy production; the power factory of the cell
mitocondrion
A collection of similar tissues joined together into a structure that performs specialized functions
organ
The group of organs that work together to break down food by physical and chemical processes into nutrients that the body can use
digestive system
A group of organs and tissues specialized for the rapid transmission and processing of information
nervous system
A tough, protective barrier that surrounds the outer membrane of some types of cells
cell wall
A membrane-bound organelle in eukaryotic cells that contains the DNA; the control center of the cell
nucleus
A self-contained living thing
organism
The group of organs that regulate the body by secreting hormones into the bloodstream; also control growth, reproduction, and metabolism
Endocrine system
A group of organs that function to produce offspring
reproductive system
a membrane bound organelles in plats that is the site of phtosynthesis
chloroplast
A structure inside a cell that performs a specialized function
organelle
A group of interacting, interrelated, or interdependent elements forming a complex whole
system
A collection of body systems that filter and remove excess fluids and waste from the body; includes the digestive, urinary, respiratory, and integumentary systems
excetory system
The group of organs that supply oxygen to the blood and get rid of carbon dioxide
respiratory system
The jellylike material inside the outer membrane of a cell that holds the nucleus, organelles, and other components of the cell
cytoplasm
A mass of similar cells that perform a specialized function
tissue
A system of organs and tissues that protects the body from external damage and water loss
Integumentary system
A group of organs that function to provide structural support and protect internal organs
Skeletal system
Organelle involved in the breakdown of foreign material and debris using digestive enzymes
lysosome