Mitosis occurs in the nucleus and forms 2 identical cells; it is a continuous process, but can be subdivided into 4 phases: prophase, metaphase, anaphase, and telophase; the resulting cells are exact duplicates (clones) of the parent cell. All DNA is double stranded but if it’s meant a single molecule of DNA, it happens in metaphase. Each chromosome makes a copy of itself during DNA synthesis wherein the original chromosome and its copy are joined together. This complete structure is called a chromosome. The two parts (original chromosome and its copy) are called chromatids. At metaphase the two chromatids begin to separate. Each chromatid, once separated, is renamed a chromosome and consists of single DNA molecule.
The endocrine system is a network of glands located throughout the head and torso. Unlike the nervous system which is directly wired throughout the body, endocrine organs are separate entities linked to each other via the cardiovascular system.
What is the cardiovascular system explained?
For the body to get oxygen, blood must be pushed from the heart through the circulatory system to the lungs. Following that, the heart pumps oxygenated blood through the arteries to the rest of the body. Veins bring blood that is oxygen-deficient back to the heart, where it is circulated again.
Why is cardiovascular important?
The cardiovascular system feeds the body's cells and organs with oxygen, nutrients, hormones, and other essential compounds. The body must be capable of meeting the demands of stress, exercise, and activity. It helps control body temperature among other things.
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Answer:
How much lighter would a human be if we had hollow bones like in birds? about 10% lighter. most of our weight is muscle (water) and fat. bones are only about 20% of our body weight.
Explanation:
so no they are actually much lighter
If an egg sits for 3 days in the water, then in will float becasue of the density of the egg
Leukotrienes are part of a class of biologically active compounds that occur naturally in the white blood cells or the leukocytes. These compounds functions in the pathogenesis of inflammation. They trigger the contraction of the smooth muscles located in the bronchioles. Excess amounts of this substance is a cause of the inflammation during asthma and in allergic rhinitis.
