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A population growth curve shows the change in the size of a population over time. It typically consists of four phases: exponential growth, plateau, decline, and equilibrium. The curve is often represented by an S-shaped logistic curve, which shows the pattern of population growth leveling off as it reaches carrying capacity.
Type II
Directional selection, where individuals with phenotypes at one extreme of the bell curve have a higher fitness compared to others. This can result in a shift in the population towards that extreme phenotype over generations.
months fifteen to twenty
Population curve is used to visually represent the distribution of a population by age groups or other categories. It helps to understand the demographic structure of a population, including factors such as birth rates, death rates, and migration patterns. It can also assist in making predictions about future population trends.
thoracic curvature and lumbar curvature
cervical, thoracic, lumbar, and sacral curvature.
Primary curvature is the concave curve of the fetal vertebral column. This is apparent in the adult thoracic and sacral regions.
The superior concave curve in the vertebral column is called the cervical lordosis.
Lumbar vertebral column
Cervical curveAtlasAxisC3 to C7Thoracic curveT1 to T12Lumbar curveL1 to L5Saccrum curveS1 to S5Coccyx curve
Kyphosis is an excessive outward curvature of the thoracic spine, causing a rounded or hunched posture. Scoliosis, on the other hand, is a lateral deviation or sideways displacement of the vertebral column, resulting in an S or C-shaped curve.
You have the convex anteriorly curve of cervical vertebrae. You have the concave anteriorly curve of thoracic vertebrae. Again you have the convex anteriorly curve of lumber vertebrae. The sacrum goes steep backward from the last lumber vertebra. Here no curve is described probably. So you have lardosis of cervical and lumber vertebrae. You have kyphosis of the thoracic vertebrae.
The lordotic curve, which includes the cervical and lumbar curves, is considered superior in the vertebral column. These curves help to maintain balance and absorb shock during movement.
There are essentially 3 curves in the human spine: 1. Cervical lordotic curve 2. Thoracic kyphotic curve 3. Lumbar lordotic curve In summary the human spine has 2 lordotic curves and 1 kyphotic curve. If you are looking at a person sideways with their face facing towards your left, the lordotic curve is concave and the kyphotic curve is convex.
The thoracic spine is from the base of the neck to the bottom of the rib cage. All the thoracic vertebrae - all 12 have ribs attached. The curve the thoracic spine has is called the thoracic curve, or kyphosis. It is normal to have a curve but if the curve is excessive or twists to the side it is abnormal. It can cause problems or if mild most people do not know it is there.
The S shaped curve of the structure and the intervertebral discs!