Hollow, that's why birds can fly. There is nothing in the bone to weigh them down.
Umm... If your talking about a bruise, then not usually, just be cautious of any radical changes in case of an infection, but a bruise is reasonable, seeing how it is trauma. If your talking about blood, then on occasion depending on your vantage point it may appear purple, don't worry it's just perspective.
Answer:
True
Explanation:
Normal flora are microorganisms that are regarded as resident organisms, which can be found on or in an individual and do not cause any disease.
the transient flora refers to microorganisms that are found on the skin or the hands which are there through direct contact with person or object, and are easily removed by routine hand hygiene. Example is Norovirus that can cause stomach flu.
Opportunistic pathogens are microorganisms such as the bacteria and virus, which can only cause infection when the immune system is down. This means that , these organisms can not cause any infection as long as the immune system is ok.
In this case, the normal and transient flora like Norovirus can only cause infection when the immune system is down. That is why they are regarded as opportunistic pathogens.
The surface of the cerebral hemispheres consists of ridges and grooves. The shallow grooves are called Sulci.
<h3>What is Cerebral Hemisphere?</h3>
The brain is formed by two cerebral hemispheres. It is separated by a groove called longitudinal fissure. The brain is divided into left and right cerebral hemispheres. These consist of an outer layer of gray matter called the cerebral cortex which is supported by an inner layer of white matter.
In placental mammals, the hemispheres are connected by the corpus callosum which is a very large bundle of nerve fibers.
There are three poles of the cerebral hemispheres:
1. The occipital pole
2. The frontal pole
3. The temporal pole
The thin layers of cells that cover the cerebral hemispheres are called the cerebral cortex. These raised ridges of tissue on the surface of the cerebral cortex are known as gyri while the shallower grooves are called sulci.
Thus, the surface of the cerebral hemispheres consists of ridges and grooves. The shallow grooves are called Sulci.
Learn more about Cerebral Hemisphere, here:
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Adrenaline which creates the “fight or flight respond” basically amplifying the function of many of the body’s internal parts to allow someone to escape from a lion.
