i believe its packing of materials
Answer:
1: (The arteries carry blood away from the heart; the veins carry it back to the heart.)
2: (In the systemic circulation, the left ventricle pumps oxygen-rich blood into the aorta.)
4: (Blood, which is low in oxygen, is collected in veins and travels to the right atrium and into the right ventricle.)
Explanation:
The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. ... In the systemic circulation, the left ventricle pumps oxygen-rich blood into the main artery (aorta).
The arteries carry blood away from the heart; the veins carry it back to the heart. ... The blood travels from the main artery to larger and smaller arteries and into the capillary network. There the blood drops off oxygen, nutrients and other important substances and picks up carbon dioxide and waste products.
The inferior and superior vena cava bring oxygen-poor blood from the body into the right atrium. The pulmonary artery channels oxygen-poor blood from the right ventricle into the lungs, where oxygen enters the bloodstream. The pulmonary veins bring oxygen-rich blood to the left atrium.
-A Helping Friend
C) To gather info about the natural world, to explain natural phenomena, and allow reasonable predictions of future events
Answer:
meter per second
Therefore, velocity is expressed in meters/second or m/s. The SI unit of velocity is meter per second (m/s). Alternatively, the velocity magnitude can also be expressed in centimeters per second (cm/s).
Explanation:
Brainliest please?
Answer:
Most autotrophs—organisms able to produce their own energy—are photosynthetic: They require sunlight and oxygen. The extremophiles of Blood Falls, however, do not use photosynthesis. They use a more unusual process called chemosynthesis. Chemosynthetic organisms are able to convert sulfur and iron compounds (not sunlight and oxygen) into energy. As Blood Falls’ chemosynthetic bacteria extract iron from the rocks they come in contact with, they gradually erode the bedrock around the lake.
Explanation:
