Unit 2 Test 2 Flashcards
The Esophagus-
a long, straight tube that connects the pharynx to the stomach
Define the Digestive System-
the organs that break down food so it can be used by the body
The Stomach-
a saclike, digestive organ that is between the esophagus and the small intestines and that breaks down food by actions of muscles, enzymes, and acids
The Small Intestines-
the organ between the stomach and the large intestines where most of the breaking down of food happens and most of the nutrients from food are absorbed
The Large Intestines-
The broader and smaller portion of the intestines, where water is removed from mostly digestive food to turn the waste into semisolid feces, or stool
The Pancreas-
the organ that lies behind the stomach and that makes digestive enzymes and hormones that regulates sugar levels
The liver-
the largest organ in the body; it makes bile, stores and filters blood, and stores excess sugar, as glycogen
The excretory system-
the system that collects and excretes nitrogenous wastes and excess water from the body in the form of urine
The kidney-
one of the organs that filter water and wastes from the blood, excrete products as urine, and regulate the concentration of certain substances in the blood
The Nephrons-
the unit in the kidney that filters blood
Urine-
the liquid excreted by the kidneys, stored in the bladder, and passed through the urethra to the outside of the body
Enzyme
A type of protein that speeds up metabolic reactions in plants and animals without being permanently changed or destroyed
The Nervous System-
organ system that is made of the structures that control the reactions and actions of the body
The brain-
The body’s/nervous system’s central command organ
The spinal cord-
a column of nerve tissue running from the base of the brain through the vertebral column
The Neuron-
a nerve cell that is specialized to receive and conduct electrical impulses
The dendrite-
branchlike extension of the neuron that that receives impulses from neighboring neurons
The axon-
an elongated extension of a neuron that carries impulses away from the cell
Endocrine System-
A collection of glands and group of cells that secrete hormones that regulate growth, development, and adrenal glands, the hypothalamus, the pineal body and other glands