What are human bodies designed for ?

Biology

1 answer:

lesya [120]2 years ago

3 0

Answer:

Explanation:

. An unsound spine

Problem: Our spines are a mess. It’s a wonder we can even walk, says Bruce Latimer, director of the Center for Human Origins at Case Western Reserve University, in Cleveland. When our ancestors walked on all fours, their spines arched, like a bow, to withstand the weight of the organs suspended below. But then we stood up. That threw the system out of whack by 90 degrees, and the spine was forced to become a column. Next, to allow for bipedalism, it curved forward at the lower back. And to keep the head in balance—so that we didn’t all walk around as if doing the limbo—the upper spine curved in the opposite direction. This change put tremendous pressure on the lower vertebrae, sticking about 80 percent of adults, according to one estimate, with lower back pain.

You might be interested in

How do the skin’s three layers differ?

ololo11 [35]

Answer:

Because they all have a different purpose

Explanation:

The epidermis provides a waterproof barrier and creates our skin tone.

The dermis, the middke layer of skin , contains tough connective tissue, hair follicles, and sweat glands.

The hypodermis is made of fat and connective tissue.

7 0

2 years ago

Read 2 more answers

What is the sequence of travel by an impulse through the cardiac conduction system?

adoni [48]

The sequence of impulse through the cardiac conduction system starts from SA node passes to AV node to atrioventricular bundle fibers and finally to Purkinje fibers.

Heart is an organ that receives oxygenated blood form lungs and deoxygenated blood from different parts of body. Oxygenated blood is transported to different organs and deoxygenated blood is transported to lungs for oxygenation.

Now, to perform this transportation, the auricles and ventricles of heart contract and relax. In order to contract and relax, impulse generation is required, which begins at SA node or Sinoatrial node. It is also referred to as pacemaker of the heart. SA node contracts the atria and the impulse transfers to AV node or Atrioventricular node.

This is followed by transfer of impulse to atrioventricular bundle fibers which further passes it on to Purkinje fibres for ventricular contraction. Now the blood is sent to lungs and aorta as per it's oxygen status.

Learn more about cardiac conduction system -

brainly.com/question/2813924

#SPJ4

4 0

1 year ago

Which of these are not included in the big idea of physical science?

ASHA 777 [7]

What?? what are you trying to say please be more specific

8 0

2 years ago

If you need to prevent waves from eroding a beach, what would you do

Zielflug [23.3K]

Waves erode a beach by pressing continually against them, right? I have heard of this happening many times. What the people do is build a small trench around the outside of the beach so the waves filter down into it, then back out instead of washing up against the sand. The other thing they do is wait a couple years for the beach to go down, then they put in new sand during the winter.

<span>Please Rate me Brainliest, I need it alot. </span>

5 0

2 years ago

Read 2 more answers

What are the primary components of panera bread's value chain?

vfiekz [6]

The value chain, Panera Bread's value chain has several component to its value chain, customer service, operating performance, and most important being inbound logistics. The most important for Panera Bread is the Priority on inbound logistics, as it is what differentiates their product from their competitors, which is their most important competitive advantage.

6 0

3 years ago