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goblinko [34]
3 years ago
13

What does "form a more perfect union" promise in the preamble

Biology
1 answer:
jolli1 [7]3 years ago
6 0
The Preamble reads: “We the people of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defense, promote the general Welfare, and secure the Blessings of Liberty for ourselves and our posterity, do ordain and establish this Constitution for
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Secondary succession (think soil) forms after a catastrophic event like a forest fire which differs from the primary succession
svetoff [14.1K]

Answer:

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Explanation:

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3 years ago
Imagine you want to identify some organisms in a local pond that you often visit. What key features about such organisms might y
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A: if it’s mobile (is able to move)

C: if it contains cilia (tiny hair-like projections that help it to move and eat)

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Just did it on edge 2020 ;D hope this helps

4 0
3 years ago
What is the function of skeletal muscles? *
AVprozaik [17]
C. Movement of the human body
Skeletal muscles gives us the ability to move
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3 years ago
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At what point do the pulmonary and systemic circulation systems meet up?
Hitman42 [59]

Answer: The Heart

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. The arteries carry blood away from the heart; the veins carry it back to the heart. The system of blood vessels resembles a tree: The “trunk” – the main artery (aorta) – branches into large arteries, which lead to smaller and smaller vessels. The smallest arteries end in a network of tiny vessels known as the capillary network.

There are two types of blood circulatory system in the human body, which are connected: The systemic circulation provides organs, tissues and cells with blood so that they get oxygen and other vital substances. The pulmonary circulation is where the fresh oxygen we breathe in enters the blood. At the same time, carbon dioxide is released from the blood.

Blood circulation starts when the heart relaxes between two heartbeats: The blood flows from both atria (the upper two chambers of the heart) into the ventricles (the lower two chambers), which then expand. The following phase is called the ejection period, which is when both ventricles pump the blood into the large arteries.

In the systemic circulation, the left ventricle pumps oxygen-rich blood into the main artery (aorta). 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 blood, which is now low in oxygen, is collected in veins and travels to the right atrium and into the right ventricle.

This is where pulmonary circulation begins: The right ventricle pumps low-oxygen blood into the pulmonary artery, which branches off into smaller and smaller arteries and capillaries. The capillaries form a fine network around the pulmonary vesicles (grape-like air sacs at the end of the airways). This is where carbon dioxide is released from the blood into the air inside the pulmonary vesicles, and fresh oxygen enters the bloodstream. When we breathe out, carbon dioxide leaves our body. Oxygen-rich blood travels through the pulmonary veins and the left atrium into the left ventricle. The next heartbeat starts a new cycle of systemic circulation. Below is an attachment of a diagram that explains the connection between pulmonary and systemic circulation from google.

5 0
3 years ago
What causes the lines to look bent when viewed through the glass of water? transmission, refraction, reflection, absorption, abs
Mila [183]
The answer is refraction.

Hope this helps!
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