Unoxygenated blood from veins enters the right atrium then it goes down to the right ventricle then out through the pulmonary artery to the lungs where it becomes oxygenated blood which then enters the heart through the pulmonary veins and it goes to the left atrium and then is pumped down to the left ventricle and out through the aorta to the arteries where it travels to different organs and becomes deoxygenated and then the cycle repeats itself.
It's C! It changes as new evidence is found.
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Answer:
The students with the purple shirts are moving through the gym doors most often.
Explanation:
- The students with the purple shirts represent potassium ions
- Potassium ions move freely across the membrane by passive transport and are important in maintaining membrane potentials
- The movement of sodium ions is through active transport therefore this is a process that requires energy (ATP) and thus these ions are less likely to move across the membrane often
The organism that cerebral ganglia in its head connected to ladder-like arrangements of nerve fibers is
A. flatworms
A flatworm is an invertebrate whose central nervous system or the cerebral ganglia is connected to its body by means of ladder-like nerve cords.