Answer:
The correct answers are:
1. closing
2. the ventricles and arteries,
3. a constricted trachea
Lub is the first sound of a heartbeat and is mentioned as S1. It is usually produced due to the closing of tricuspid and and mitral or bicuspid valves present between atria and ventricles.
Tricupsid is located between atrium and ventricle of the right hand side and mitral valve is located between atrium and ventricle of the left hand side. They prevent the back flow of blood from ventricles to their respective atria.
Dub, being the second sound is written as S2. It is produced due to the closing of pulmonary (located between right ventricle and pulmonary artery) and aortic valves (located between left artery and aorta).
These valves prevent the back flow of blood from arteries into the ventricles.
The time between the two sounds is often taken as the measure of the diastole i.e. ventricular filling.
Wheezing refers to a high-pitched sound produced when a person breathes, especially during exhale. It is caused by constriction of the airways or inflammation. It is considered as a symptom of various diseases such as asthma, COPD, allergies, bronchitis etc.
Answer:
The correct answer is - NO.
Explanation:
To be specific to the question, the answer would be no as analogous structures do not show that two distinct come from a common ancestor. However, it shows the evolutionary relationship by stating that the species have different evolutionary origins and developmental patterns as they developed the organs with similar function and appearance but anatomically and embryological development is different.
The answer to the question "Do wings show that a fly is related to a bird?", is no it does not show the relation between fly and bird.
Answer:
The term Caribbean culture summarises the artistic, musical, literary, culinary, political and social elements that are representative of Caribbean people all over the world.
Explanation:
Much of it is ocean and the Caribbean region includes about 700 islands, islets, reefs, and cays in and surrounding the Caribbean Sea. Across the Caribbean region, there is diverse topography including coral reefs, mountains, tropical forests, low-lying plantations, valleys, waterfalls, and volcanoes.
The independent variable would be the color of light, the dependent variable would be the growing speed, the control variable would be colorless light
Answer:
I believe it's D
Explanation:
I think its d because genetic engineering can cure genetic diseases
