Answer:With this system, blood always flows in only one direction inside the heart. There are also valves at the bottom of the large arteries that carry blood away from the heart: the aorta and the pulmonary artery. These valves keep the blood from flowing backward into the heart once it has been pumped out.
Explanation:
Answer: B
Explanation: Aphthous ulcers are white, round, or oval lesions surrounded by a red halo that appear on the buccal mucosa.
Answer:
Emerging Issues in Global Health. Globally, the rate of deaths from noncommunicable causes, such as heart disease, stroke, and injuries, is growing. At the same time, the number of deaths from infectious diseases, such as malaria, tuberculosis, and vaccine-preventable diseases, is decreasing.
Explanation:
The number of bones a person has in their body generally depends on their age. A human newborn baby has approximately 270 bones in his or her body. As the person ages and develops, some of the bones fuse together to make larger bones. By the time a person is an adult, they have the standard 206 bones in their body.
Answer:
Cervix i think tell me if im right
Explanation:
