The left atrium lacks a group of pace maker cells.
The circulatory system circulates blood around the body. The blood passes through the lungs, where it loses carbon dioxide and gains oxygen. All cells need oxygen to function and carbon dioxide is a form of waste produced in the cells. The digestive system breaks down food and absorbs.
What are the characteristics of continental tropical air masses?
ANSWER:
They have warm, moist air.
Which description refers to stratus clouds?
ANSWER:
Covers all or most of the sky.
I have attached screenshots from my searches as evidence supporting my answers.
Hope this helps! :)
Have a lovely day! <3
A. Decompostion :) :) :) :) :)
Most lipids are <u>nonpolar</u>. This property causes lipids to be <u>water-insoluble</u> in the bloodstream. Lipoproteins form <u>water-soluble </u>complexes for transport through the bloodstream by surrounding <u>nonpolar</u> lipids with <u>polar </u>phospholipids and proteins .
A central hydrophobic core of non-polar lipids, predominantly cholesterol esters and triglycerides, makes up the complex particles known as lipoproteins. Since lipids like cholesterol and triglycerides are not soluble in water, they must be carried in the bloodstream along with proteins called lipoproteins.
These lipoproteins are essential for the small intestine to absorb and transport dietary lipids, for lipids to travel from the liver to peripheral tissues, and for lipids to travel from peripheral tissues to the liver and intestine.
To learn more about lipoproteins click here
brainly.com/question/9041034
#SPJ4
