Unit 1 - Cells, Tissues, And Organ Systems Flashcards
Cell
Basic unit of a living organism that can perform all the processes associated with life (Pg. 1)
Diffusion
Movement of particles from an area of high concentration to areas of lower concentration (Pg. 33)
Multicellular
Having or being made up of two or more cells; most plants and animals are examples (Pg. 13)
Organ
Group of different types of tissues that work together to form a function (Pg. 3)
Organelle
In cells that have a nucleus, small structures that work within a cell preforming specific functions for the cell (Pg. 13)
Osmosis
Movement of water particles through a selectively permeable membrane from a area of higher concentration to an area of lower concentration (Pg. 34)
Selectively Permeable
Allowing certain substances, but not others, to pass through; cell membranes are an example (Pg. 33)
Organ System
Group of organs that work together to perform a function (Pg. 45)
Tissue
Group of the same type of cells that work together to perform a specific function (Pg. 3)
Unicellular
Having or being made up of only one single cell; most microscopic organisms are examples (Pg. 13)
Cytoplasm
The liquid-like substance contained in the cell (Pg. 13)
Specialized Cells
Cells in different parts of the body having special features that enable them to perform specific functions (Pg. 39)
Red Blood Cells
Cells that can carry oxygen to all the cells of the body (Pg. 39)
Connective Tissue
Tissue which supports other tissues and connects different parts of the body; includes blood, fat, bones, cartilage, and tendons (Pg. 39)
Epithelial Tissue
Tissue that covers the surface of the body and the outside of organs; includes skin and the linings of passages inside the body (Pg. 39)
Nervous Tissue
Tissue that carries messages to and from the brain and other parts of the body; includes brain, spinal cord, and nerves (Pg. 40)
Muscle Tissue
Tissue that allows the body to move; specialized for contraction (Pg. 40)
Interdependent
Depending on one another - here this refers to the concept that the body’s organ systems depend on one another to function (Pg. 43)
Respiratory System
A series of organs responsible for taking in oxygen and expelling carbon dioxide.
Digestive System
A group of organs working together to convert food into energy and basic nutrients to feed the entire body.
Nervous System
A complex network of nerves and cells that carry messages to and from the brain and spinal cord to various parts of the body.
Excretory System
The system of an organism’s body that performs the function of excretion, the bodily process of discharging wastes.
Circulatory System
Is an organ system that permits blood to circulate and transport nutrients oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body.
Heart
Fist-sized organ that acts as a hydraulic pump for the circulatory system; pumps blood throughout the body; has a squeezing (contracting) action followed by a relaxing action (Pg. 50)
