Answer:
Lung disease is any problem in the lungs that prevents the lungs from working properly. There are three main types of lung disease:
Airway diseases -- These diseases affect the tubes (airways) that carry oxygen and other gases into and out of the lungs. They usually cause a narrowing or blockage of the airways. Airway diseases include asthma, COPD and bronchiectasis. People with airway diseases often say they feel as if they're "trying to breathe out through a straw."
Lung tissue diseases -- These diseases affect the structure of the lung tissue. Scarring or inflammation of the tissue makes the lungs unable to expand fully (restrictive lung disease). This makes it hard for the lungs to take in oxygen and release carbon dioxide. People with this type of lung disorder often say they feel as if they are "wearing a too-tight sweater or vest." As a result, they can't breathe deeply. Pulmonary fibrosis and sarcoidosis are examples of lung tissue disease.
Lung circulation diseases -- These diseases affect the blood vessels in the lungs. They are caused by clotting, scarring, or inflammation of the blood vessels. They affect the ability of the lungs to take up oxygen and release carbon dioxide. These diseases may also affect heart function. An example of a lung circulation disease is pulmonary hypertension. People with these conditions often feel very short of breath when they exert themselves.
Explanation:
Put it your own words cause this is kinda advance for 7th
False unlike the outer core the inner core is made out of mostly solid because it contains iron
It is proven to help build healthy muscles, joints, bones etc. It also has a good effect on your academic performance, as it increases the oxygen flow to the brain.
Answer: Meiosis is important because it helps to sexually reproduce offsprings with diploid number of chromosomes and enables genetic diversity in a population. Without meiosis, gametogenesis (production of new gametes) can not occur.
Explanation:
Meiosis is a type of cell division in which parents' cells undergoes division twice to produce four daughter cells each with half the number of chromosomes of the parents. In meiosis, a diploid cell undergoes division to produce a haploid cell and two haploid cells combine to form a diploid offspring. Meiosis occurs in sex cells or gametes. The crossing over of genes that occurs in meiosis allows the combination of the two parental (paternal and maternal) genes resulting in an offspring in which either of these genes is expressed
Answer:
an onion cell has a rectangular shape
