Structural organization
What is a cell ?
the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body.
What is enzyme?
Breaks down specific foods with chemical separation.
What is red blood cell?
Carry oxygen to the body cells to iron rich hemoglobin ( gives red color)
Largest solid portion of the blood by volume
No nucleus
What is external respiration?
Air enters the lungs through the trachea and bronchi and end in air sacs at the end of the bronchioles called alveoli.
These alveoli have thin membranes with a rich capillary network
Oxygen and carbon dioxide are dioxide are exchange by diffusion between the alveoli and capillaries
What is zygote?
when a egg and a sperm are fertilized they form a zygote. The zygote goes through a number of divisions through mitosis and form exact clones of the original cells.
What is Tissue?
A tissue is a group of cells that have a similar shape and function
What is mechanical digestion?
Teeth and tongue grind down and chop food smaller
What is white blood cell?
Flexible cell membrane engulfs invading bacteria , viruses, etc.
Contains a nucleus
What is internal respiration?
There are two parts :The first is the exchange of gasses between the bloodstream and the tissues. The second is the process of cellular respiration, from which cells utilize oxygen to perform basic metabolic functions.
What is blastocyst?
Zygote for a big ball of cells called a blastocyst which are precursors to stem
What is connective tissue?
Most abundant and widely distributed of the tissues. Connective tissue supports other tissues and binds them together.
What is chemical digestion?
Salive adds enzymes which break down the food chemically
What is platelet?
Helps wounds to clot so blood remains in the circulatory system
No nucleus
What is inhalation?
Volume increases low pressure in lungs
Diaphragm contracts and moves down
Rib cage moves up and down
What is adult stem cell?
These stem cells are found in small numbers in most adult tissues, such as bone marrow or fat. Compared with embryonic stem cells, adult stem cells have a more limited ability to give rise to various cells of the body
What is epithelial tissue?
Covers the body's surface and forms the lining for most internal cavities. The major functions include: protection, secretion, adsorption and filtration.
What is peristalsis?
Slow rhythmic contractions of the esophagus to transport the food from mouth to stomach.
What is artery?
vessels that can carry blood away from the heart
Extremely thick walls to withstand the strong pressure exerted by the pumping of the heart and to control blood pressure
What is exhalation?
volume decreases , high pressure in lungs
Diaphragm relaxes and moves up
Rib cage moves down and in
What is stem cell?
Cells that specialize into different cell types depending on the part of their DNA that is turned on.
What is muscular tissue?
Skeletal muscle is a voluntary type of muscle that is used to move the skeleton
Smooth muscle is an involuntary type of muscle in the walls of internal organs and blood vessels
Cardiac muscle is an involuntary muscle found only in the walls of the heart
What is villi?
increase the surface area allowing for effective absorption of nutrients.
What is capillary?
tiny network of vessels that connects the arteries to the veins
Provide oxygen and nutrients to the body tissues
Take away carbon dioxide and waste from the body tissue
What is cell differentiation?
Stem cells are cells that specialize into different cell types depending on the part of their DNA that is turned on
This results in cells such as: heart cells, muscle cells, nerve cells, bone cells , etc.