The zygote is described as omnipotent because it ultimately gives rise to all the cells in your body including the highly specialized cells of your nervous system. Describe this transition, discussing the steps and processes that lead to these specialized cells. Exchange of oxygen and carbon-dioxide between the body and air, acid-base balance regulation, phonation.

Forebrain: It comprises the cerebrum, hypothalamus, and thalamus. The largest part of the brain is the cerebrum. Thinking, perceiving, controlling motor function, receiving and processing information and understanding language are the main functions done by this section of the brain. Also, sexual development and emotion functions are attached to the fore-brain.Longissimus cervicis - attaches to the transverse processes of T1-T5 and transverse processes of C2-C6. Pyramidalis is a small triangular muscle found in the lower abdomen. It lies anterior to the rectus abdominis muscle. It extends from the pubic symphysis and pubic crest to the linea alba. The action of this muscle is to tense the linea alba, which is initiated by the subcostal nerve. Pyramidalis is a variable muscle of the abdominal wall, being absent in about 20% of the population. The ancient Greek sculptor Polykleitos (c.450–420 BCE), known for his ideally proportioned bronze Doryphoros, wrote an influential Canon (now lost) describing the proportions to be followed in sculpture. [18] The Canon applies the basic mathematical concepts of Greek geometry, such as the ratio, proportion, and symmetria (Greek for "harmonious proportions") creating a system capable of describing the human form through a series of continuous geometric progressions. [19] Polykleitos may have used the distal phalanx of the little finger as the basic module for determining the proportions of the human body, scaling this length up repeatedly by √ 2 to obtain the ideal size of the other phalanges, the hand, forearm, and upper arm in turn. [20]

The structure of striated, or skeletal, muscle. Striated muscle tissue, such as the tissue of the human biceps muscle, consists of long fine fibres, each of which is in effect a bundle of finer myofibrils. Within each myofibril are filaments of the proteins myosin and actin; these filaments slide past one another as the muscle contracts and expands. On each myofibril, regularly occurring dark bands, called Z lines, can be seen where actin and myosin filaments overlap. The region between two Z lines is called a sarcomere; sarcomeres can be considered the primary structural and functional unit of muscle tissue. (more) This work, Anatomy & Physiology, is adapted from Anatomy & Physiology by OpenStax, licensed under CC BY. This edition, with revised content and artwork, is licensed under CC BY-SA except where otherwise noted. The vagina can vary in size, but the average length is about 2.5 to 3 inches. That said, it expands in length during arousal. More than likely you have experienced the sensation of your heart beating out of your chest countless times during intense emotional moments. As a health science student, the dreaded feeling of chest pain experienced by patients during myocardial infarctions should also be familiar knowledge. However, what is the anatomic definition or meaning of a ‘chest’? Longissimus represents the intermediate column of erector spinae. It is also the largest member of the muscle group. Longissimus is divided into several regions or parts:Kothari C, Diorio C, Durocher F. The importance of breast adipose tissue in breast cancer. Int J Mol Sci. 2020;21(16):5760. doi:10.3390/ijms21165760

Static core functionality is the ability of one's core to align the skeleton to resist a force that does not change. In insects, crustaceans, and the extinct trilobites, the thorax is one of the three main divisions of the creature's body, each of which is in turn composed of multiple segments. It is the area where the wings and legs attach in insects, or an area of multiple articulating plates in trilobites. In most insects, the thorax itself is composed of three segments; the prothorax, the mesothorax, and the metathorax. In extant insects, the prothorax never has wings, though legs are always present in adults; wings (when present) are restricted to at least the mesothorax, and typically also the metathorax, though the wings may be reduced or modified on either or both segments. In the Apocritan Hymenoptera, the first abdominal segment is fused to the metathorax, where it forms a structure known as the propodeum. Accordingly, in these insects, the functional thorax is composed of four segments, and is therefore typically called the mesosoma to distinguish it from the "thorax" of other insects. Chrysanthou, Andrea (27 July 2017). "How to Measure Leg-to-Body Ratio". Sportsrec.com . Retrieved 30 September 2020. All content published on Kenhub is reviewed by medical and anatomy experts. The information we provide is grounded on academic literature and peer-reviewed research. Kenhub does not provide medical advice. You can learn more about our content creation and review standards by reading our content quality guidelines.

Anterior trunk muscles

The frontal lobe: The frontal lobe, which is located in the front of the head, is the largest section of the brain. It plays a role in many conscious functions, including personality and movement. It also helps the brain interpret smells.