Answer:
The pressure that results from the tendency of the lungs to decrease or shrink, while the chest wall seeks to enlarge them is called intrapleural pressure.
Explanation:
The process of pulmonary ventilation involves the existence of a set of opposite pressures that change depending on the phase of the breath in which they are.
The atmospheric pressure tends to be higher than the pulmonary pressure, which allows air to enter the lungs, while in exhalation there is an increase in pressure in the lungs that pushes the air out.
- The tendency of the lungs, due to their elasticity, is to contract or decrease in size.
- The chest wall exerts an attraction effect on the lungs, which prevents them from contracting and keeps them expanded.
- <em>The difference between these opposing pressures is called the </em><em>intrapleural pressure</em><em>, which is a negative pressure, especially during expiration.
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The loss of chest wall integrity, caused by an open wound, causes the lungs to close due to air entering the chest.
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Intrapleural pressure brainly.com/question/9209660
Answer:
It allow organisms to pass down their traits to the next generation.
Explanation:
Reproduction can be defined as a biological process which typically involves living organisms producing an offspring.
Basically, there are two (2) methods of reproduction and these are;
I. Sexual reproduction: it involves the combination of the genome (gamete) of a male and female living organism during fertilization.
II. Asexual reproduction: it involves the cloning of a living organism to produce an offspring because there is only a single parent.
Natural selection can be defined as a biological process in which species of living organisms having certain traits that enable them to adapt to environmental factors such as predators, competition for food, climate change, sex mates, etc., tend to survive and reproduce, as well as passing on their genes to subsequent generations.
Simply stated, natural selection entails the survival of the fittest.
Artificial selection is also known as selective breeding and it is a process that involves humans (breeders) selecting the animal or plant with desirable traits in order to reproduce favorable offspring having phenotypic traits.
Hence, the role which reproduction play in both natural and artificial selection is that it allow organisms to pass down their traits to the next generation.
<u>Answer</u>:
Vestigial organs are those organs that were present in the past ancestors but absent in their present generations. Vestigial organs are not leftover of evolution because they are evolved to perform a different function.
<u>Explanation</u>:
For example, an appendix is considered as a vestigial organ but it helps in storing good bacteria and plays a vital role in the immune system. These vestigial organs are the product of changing the environment and adaptation to the changing environment. Due to natural selection some specific traits have been passed down to generations which helped the animals to survive in those conditions. The other examples of vestigial organs are wisdom teeth coccyx, tonsils, several genes in the chromosomes and our hair.