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of the eye.
of the eye.

... The Structure of the Eye: The Fibrous Layer (outer layer): – The cornea (a transparent, thin layer of epithelium that allows for light transmission into the eye) – The sclera which is connected to the cornea (the white part of the eye) which protects the eyes & is the attachment for the extrinsic m ...
Connective and Muscle Tissues
Connective and Muscle Tissues

... Found throughout the body; most abundant and widely distributed in primary tissues Connective tissues have: Mesenchyme as their common tissue of origin Varying degrees of vascularity Nonliving extracellular matrix, consisting of ground substance and ____________ Structural Elements of Connective Tis ...
Developmental Anatomy of the Respiratory system
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paired pleuropericardial membranes and the diaphragm.
paired pleuropericardial membranes and the diaphragm.

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• Lecture 18: Development of thoracic cavity and diaphragm • Dr
• Lecture 18: Development of thoracic cavity and diaphragm • Dr

... – 2. The formation of these membranes appears to be aided by lung buds invading the lateral body wall and by tension on the common cardinal veins resulting from rapid longitudinal growth. – 3. These membranes develop into the definitive fibrous pericardium surrounding the heart. ...
The Respiratory system includes tubes that
The Respiratory system includes tubes that

... diameter and 12.5 cm long. It extends downward in front of the esophagus and into the thoracic cavity where it splits into right and left bronchi. Has cartilage rings to prevent the trachea from collapsing. ...
Respiratory System[1] - missdannocksyear11biologyclass
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Connective Tissue
Connective Tissue

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Cells and Tissues
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Chapter 1: Introduction to Human Anatomy and Physiology
Chapter 1: Introduction to Human Anatomy and Physiology

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Chapter 2: Cells - The Units of Life

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the Ear Chapter
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Connective_Muscle and Nervous Tissue CP spring semester
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Correlative Body Systems

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Human embryogenesis



Human embryogenesis is the process of cell division and cellular differentiation of the embryo that occurs during the early stages of development. In biological terms, human development entails growth from a one celled zygote to an adult human being. Fertilisation occurs when the sperm cell successfully enters and fuses with an egg cell (ovum). The genetic material of the sperm and egg then combine to form a single cell called a zygote and the germinal stage of prenatal development commences. Embryogenesis covers the first eight weeks of development and at the beginning of the ninth week the embryo is termed a fetus.Human embryology is the study of this development during the first eight weeks after fertilisation. The normal period of gestation (pregnancy) is nine months or 38 weeks.The germinal stage, refers to the time from fertilization, through the development of the early embryo until implantation is completed in the uterus. The germinal stage takes around 10 days.During this stage, the zygote, which is defined as an embryo because it contains a full complement of genetic material, begins to divide, in a process called cleavage. A blastocyst is then formed and implanted in the uterus. Embryogenesis continues with the next stage of gastrulation when the three germ layers of the embryo form in a process called histogenesis, and the processes of neurulation and organogenesis follow. The embryo is referred to as a fetus in the later stages of prenatal development, usually taken to be at the beginning of the ninth week. In comparison to the embryo, the fetus has more recognizable external features, and a more complete set of developing organs. The entire process of embryogenesis involves coordinated spatial and temporal changes in gene expression, cell growth and cellular differentiation. A nearly identical process occurs in other species, especially among chordates.
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