Flashcards in Mayyy Deck (40):
The human body is organized into levels:
Atom, Molecule, Organelle, Cell, Tissue, Organ, Organ System, Organism.
Is the smallest unit in all things.
Is an organ of a cell with a specific job: has molecules such as DNA and proteins.
Are a group of cells that are similar to one another and have the same functions.
There are 4 different tissues in the human body:
Epithelial, Connective, Muscle, Nervous.
A group of organs that work together to do a specific task.
How many body systems are:
11 body systems.
For what body systems are for:
That all work together to keep an organism alive, and produce body movement.
Nervous, Endocrine, Respiratory, Circulatory, Lymphatic, Digestive, Urinary, Skeletal, Muscular, Integumentary, Reproductive.
The body’s communication systems help maintain homeostasis:
Temperature, fluids, salts, pH, nutrients, gases.
The _______ and ________ systems responds to stimuli.
The cells of the nervous system are called ________.
Conducts electrical impulses that allow cells, tissues, and organs to detect and responds to stimuli.
Help you gather information about your environment, interpret it, and react to it.
A neuron has 3 regions:
Dendrites, Cell body, Axon.
There are 3 types of neurons each with specific function:
Sensory, Interneurons, Motor.
When all three types of neurons are used the same time:
Is a called reflex.
Is a group of organs that release hormones called glands.
The endocrine system.
A _______ is a chemical released by and endocrine gland that influences specific cell types on how to function.
Gives O2 to body cells and removes CO2 waste from cells.
The respiratory system.
Two processes make up the respiratory system.
Breathing and respiration.
Is the mechanical movement of air into and out of the lungs
Respiration can be:
Internal and external.
Prevents food from entering the respiratory tubes.
The trachea divides into 2 large tubes called ________.
The bronchi divide into smaller tubes called _________.
Small bags of air.
Transport blood to deliver O2 and nutrients to cells, and remove wastes like CO2.
The circulatory system.
Arteries, Capillaries, Veins.
Carries oxygenated blood away from the body’s cells.
Are where exchanges of substances and wastes occur through the process of diffusion.
Carry deoxygenated blood back to the heart.
Is made of cardiac muscle, Is hollow, approximately the size of your fist.
What sound does the heart makes:
“Lub, dub” sound.
Does two pumping functions at the same time:
Pumps oxygenated blood to the body.
Pumps deoxygenated blood to the lungs.
Is divided into four “rooms” or chambers:
The right atrium, The left atrium, The right ventricle, The left ventricle.
They separate the atria form the ventricles and keep blood from flowing backawards:
A. Deoxygenated blood enters from the superior or inferior Vena Cava (vein) into the right atrium.
B. Then, blood passes through the tricuspid valve into the the right ventricle.
C. Blood exits through the pulmonary valve and into the pulmonary artery.
D. Then, blood enters the left or right lungs.
E. Blood becomes oxygenated in the lungs, returns to the heart through to the pulmonary veins, and enters LEFT atrium.
F. Blood goes through the mitral valve and into the LEFT ventricle.
G. Blood goes through the aortic valve into the aorta.
H. Oxygenated blood travels through the arteries, enters the capillaries where it becomes deoxygenated, and to the veins.
• Then the cycle begins again.