Question

82 Complex Factual Activity
Complete
1) Blockage of artery means =
11) Blockage of artery in the brain or neck result in =
ii) Bursting of blood vessels and bleeding in brain result in =
iv) Death of brain cells result in =​

Answer 1

Answer:

Think of a stroke as a "brain attack"— it is an emergency! When symptoms appear, call 911 immediately; every minute counts. A stroke occurs when the brain is deprived of blood supply. Without oxygen, brain cells die. Depending on the area affected, a person may have problems speaking, walking, seeing, or thinking. A stroke may result in permanent brain damage or death. If the stroke is caused by a blood clot, a clot-busting drug or retrieval device may be used to restore blood flow.

Blood supply of the brain

To understand stroke, it is helpful to know how blood circulates to the brain (see Anatomy of the Brain). Blood is pumped from the heart and carried to the brain by two paired arteries, the internal carotid arteries and the vertebral arteries (Fig. 1). The internal carotid arteries supply the anterior (front) areas and the vertebral arteries supply the posterior (back) areas of the brain. After passing through the skull, the right and left vertebral arteries join together to form a single basilar artery. The basilar artery and the internal carotid arteries communicate with each other in a ring at the base of the brain called the circle of willis

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