List in order the blood vessels and parts of the heart which a glucose molecule would travel through on its way from your digestive system to a muscle in your legs
Answers
Answer:
Blood, the heart, and blood vessels make up the circulatory system. Pumped ... network of blood vessels to different parts of the body. ... White blood cells can squeeze their way through.
Explanation:
The heart muscle is asymmetrical as a result of the distance blood must travel in the pulmonary and systemic circuits. Since the right side of the heart sends blood to the pulmonary circuit it is smaller than the left side which must send blood out to the whole body in the systemic circuit.
I hope this will help you if it is do follow me
Answer:
mark me as brainlist
Explanation:
120
The Circulatory System
Most of the cells in the human body are NOT in direct contact with the external environment so how do they receive
the nutrients that have been broken down by the digestive system? The circulatory system acts as a transport
service for these cells. Blood, the heart, and blood vessels make up the circulatory system. Pumped by the heart,
blood travels through a network of vessels, carrying materials such as oxygen, nutrients, and hormones to, and
waste products from, each of the hundred trillion cells in the human body.
Blood Vessels (arteries, veins, and capillaries):
The circulatory system is known as a CLOSED SYSTEM because the blood is contained within either the heart or
blood vessels at all times. The blood vessels that are part of the closed circulatory system of humans form a vast
network to help keep the blood flowing in one direction. After the blood leaves the heart, it is pumped through a
network of blood vessels to different parts of the body. The blood vessels that form this network are the arteries,
capillaries, and veins.
Arteries are blood vessels that generally carry oxygen rich blood AWAY from the heart and lungs to the capillaries.
The walls of arteries are generally thicker than those of veins. The smooth muscle cells and elastic fibers that make
up the walls help make arteries tough and flexible. This enables arteries to withstand the high pressure of blood as it
is pumped from the heart. The force that blood exerts on the walls of blood vessels is known as blood pressure.
Except for the pulmonary arteries that lead from the heart to the lungs, all arteries carry bright red, oxygen-rich
blood. The artery that carries oxygen-rich blood away from the heart to the rest of the body is the aorta, the largest
artery in the body. As the aorta travels away from the heart, it branches repeatedly into smaller arteries so that all
parts of the body are supplied. The smallest arteries are called arterioles.
Capillaries connect arteries to veins. They are tiny blood vessels as
thin or thinner than the hairs on your head; they are barely as wide as
the diameter of one cell. It is in the thin-walled capillaries that the real
work of the circulatory system is done. The walls of the capillaries
consist of only one layer of cells, making it easy for oxygen, food
substances (nutrients), and wastes to pass in and out of your blood
through the capillary walls. The human body has more than 10 billion
capillaries; the network of capillaries in the body is so extensive that very few living cells lie farther than 0.01 mm
(0.0005 in.) from a capillary.
Veins carry blood back toward your heart. The smallest veins, also called venules, are very thin. They join larger
veins that open into the heart. The veins generally carry dark red blood that
doesn't have much oxygen. Veins have thin walls; they don't need to be as strong
as the arteries because as blood is returned to the heart, it is under less pressure.
Veins contain valves that prevent blood from flowing backwards, which is
especially important where blood must flow against the force of gravity. The
flow of blood in veins is helped by contractions of skeletal muscles, especially those
in the arms and legs. When muscles contract, they squeeze against veins
and help force blood toward the heart.