In fetal circulation, the ductus venosus bypasses the liver and the ductus arteriousus bypasses the lungs. Ductus arteriosus also called ductus botalli is a blood vessel connecting the main pulmonary artery to the proximal ascending aorta. It does allow most of the blood from right ventricle to bypass the fetus's fluid-filled non-functioning lungs. Ductus venosus on the hand allows oxygenated blood from the placenta to bypass the liver.
<span>When the lid for a vat
of wine is slightly open, the yeast inside can continue to perform alcoholic
fermentation because the carbon dioxide produced by the yeast during
fermentation will act as a blanket over the wine. Nevertheless, the air around the fermenter
must be still and enough carbon dioxide should be produced to continue
alcoholic fermentation. However, at some point, carbon dioxide will fall and
can no longer protect the wine. This is the right time to get your wine covered
before it will be vulnerable to undesirable microorganisms. </span>
Therefore, open fermentation
is good in the early stages of fermentation because yeast need oxygen to synthesize sterols and assimilate
fatty acids to ensure the nutrients it needs to multiply and ferment the 70% of the sugar from the fruit. Furthermore,
the yeast is responsible in decomposing sugar from the grapes into alcohol and
carbon dioxide.
In terms of human evolution, the sagittal crest was usually more pronounced and larger in older and robust species compared to younger or gracile species.
Hope that helped! :)
The correct steps of endochondral ossification is:
- A periosteal bone collar develops.
- spongy bone and the medullary cavity form in the diaphysis.
- The diaphysis center is vascularized and osteoblasts deposit osteoid over calcified cartilage matrix.
- The epiphyseal center is vascularized and osteoblasts deposit osteoid over the calcified cartilage matrix.
- The spongy bone forms in epiphysis.
<h3>Which bones grow by endochondral ossification?</h3>
Long and short bones, such as the phalanges and femur, arise from a cartilage model formed by endochondral ossification. Distinguishing between these two types of osteogenesis does not imply the existence of multiple types of bone tissue.
Endochondral ossification mainly forms in two stages: modifications of the hyaline cartilage that ends with the death of chondrocytes and invasion of osteogenic cells and their differentiation into osteoblasts in the cavities previously occupied by chondrocytes for deposition.
See more about Endochondral ossification at brainly.com/question/9211436
#SPJ1