Answer:
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium. The pulmonary vein empties oxygen-rich blood, from the lungs into the left atrium.
Explanation:
hope this helps...
and if u didn't get it its veins...
The answer to your answer is B because who cares what your freinds think,from a personal experience I shouldn't but I do,but still I shouldn't and neither should you or anyone else for that matter.
Answer:
D. Wally ensures that unauthorized people do not enter the healthcare facility.
Explanation:
The correct order of living units from smallest to largest are: 1) Molecule 2) Organelle 3) Cell 4) Tissue 5) Organism 6) Population.
A molecule<span> is the smallest particle in a chemical element that has the chemical properties of that element or compound.
</span>An organelle<span> is a tiny cellular structure that performs specific functions within a cell. Meaning they are smaller than cells.
A cell </span><span>contains the fundamental molecules of life and of which all living things are composed of.
</span>Tissue is <span>a group of cells found together in the body.
Organisms are made up of organs, which are made up of tissues. It </span><span>is a living thing that can function on its own.
</span><span>Population are groups of living things that live together in a particular area. They are capable of interbreeding.
</span>
decreased gas diffusion in the alveoli
