Peripheral nervous system: The portion of the nervous system that is outside the brain and spinal cord. Abbreviated PNS. The nerves in the PNS connect the central nervous system (CNS) to sensory organs, such as the eye and ear, and to other organs of the body, muscles, blood vessels, and glands
Skeletal muscles are attached to the skeleton by tough connective tissues called tendons(see Figure above). Many skeletal muscles are attached to the ends of bones that meet at a joint. The muscles span the joint and connect the bones. When the muscles contract, they pull on the bones, causing them to move.
Answer:
See below ~
Explanation:
The amniotic sac is the <u>thin fluid-filled membrane</u> that surrounds and protects a developing fetus. The amniotic fluid is the <u>protective liquid</u> contained by the amniotic sac of a gravid amniote. This fluid serves as a <u>cushion for the growing fetus</u>, but also serves to <u>facilitate the exchange of nutrients, water, and biochemical products between mother and fetus</u>.
The placenta is a temporary <u>fetal organ</u> that begins developing from the blastocyst shortly after implantation. It plays critical roles in <u>facilitating nutrient, gas and waste exchange</u> between the physically separate maternal and fetal circulations.
The umbilical cord connects the developing fetus with the placenta while the <u>fetus is in the uterus</u>. The umbilical arteries and vein run within this cord. The umbilical cord is clamped and cut at birth, and its residual tip forms the belly button.
Answer:Even though your heart beats more times a minute after exercising or overexertion, healthy blood vessels dilate (get larger) to allow more blood to flow through more easily. Taking your pulse can measure your cardiovascular activity and oxygen consumption, but it is not a substitute for measuring your blood pressure.
Explanation:
1. helps improve or maintain overall health
