• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Exam 1
Exam 1

... • Write your student number in the space provided above on this page. • Check that your name and student number as printed on your answer sheet for multiple-choice questions are correct, and sign your name in the space provided to verify this. • All written responses must be in English. At the end o ...
Phylum Chordata
Phylum Chordata

... with the protostome branch; this is considered unlikely. The important common features are: radial cleavage, anus derived from the blastopore, mouth derived from a secondary opening, and a coelom formed by fusion of enterocoelous pouches. ...
Animal Development and Phylogeny Notes
Animal Development and Phylogeny Notes

... 1. Different regions of the ...
Terminology - Midlandstech
Terminology - Midlandstech

... Away from the head end and toward the lower part of the body. ...
BIO 102 Lecture Notes
BIO 102 Lecture Notes

... then spliced onto the host DNA on a chromosome. The host cell's DNA polymerase will then transcribe the viral DNA into mRNA which will either be translated into the protein of which the viral coat is composed, or will become the new viral genome. * HIV attacks the human t-helper cell which functions ...
Evolution of Metabolism Puzzle Race
Evolution of Metabolism Puzzle Race

... passageways that traveled through their whole bodies to distribute energy and oxygen to all their cells. These passageways evolved to become blood vessels! Larger animals also need more energy, so the stomach pocket elongated to form a passageway through the center of their entire bodies called the ...
Cell Diversity
Cell Diversity

... both companion and sieve tube cell ...
12-Additional Systems0
12-Additional Systems0

... a. supports body and individual parts eg. cartilage & nose ...
File - Wk 1-2
File - Wk 1-2

...  The submucosal and myenteric plexus’ of the gastrointestinal tract are composed of ganglia  The myenteric ganglia form a continuous network from the upper oesophagus to the internal anal sphincter. These act to regulate GIS motility (the movement along the tract)  The submucosal ganglia are conc ...
Features Used to Classify Animals
Features Used to Classify Animals

... a few other structures. The mesoderm is the third germ layer; it forms between the endoderm and ectoderm in triploblasts. This germ layer gives rise to all muscle tissues (including the cardiac tissues and muscles of the intestines), connective tissues such as the skeleton and blood cells, and most ...
detailed lecture outline
detailed lecture outline

... walls of hollow organs). 4. Neural tissue carries electrical signals from one part of the body to another. ...
lee_mervin_mentoor - University of Western Cape
lee_mervin_mentoor - University of Western Cape

... 2)Martindale MQ,Finnerty J and Henry JQ.The radiata and the evolutionary origin of bilateria body ...
Chapter 4: The Tissue Level of Organization
Chapter 4: The Tissue Level of Organization

... walls of hollow organs). 4. Neural tissue carries electrical signals from one part of the body to another. ...
Teacher Edition
Teacher Edition

... Then ask, How does the shape of sickled red blood cells prevent them from performing their function? The sickled red blood cells are rigid and stack on one another. This causes them to clog the blood vessels, leading to weakness, pain, organ damage, and sometimes paraly­sis. This clogging is shown i ...
Endoscopic Sinus Surgery
Endoscopic Sinus Surgery

... Uncapped agger nasi cells, the terminal recess, and the ethmoid bulla form domes that are joined together. It often appears that this is all there is and they might fool you into thinking that one of them is a small frontal sinus. ...
Animal Diversity File
Animal Diversity File

... Three tissue layers in embryo. Almost all animals share this basic feature; the sponges and cnidarians are exceptions. Acoelomate: Flatworms don't have any kind of coelom or pseudocoelom; their bodies are basically solid. This simple body structure led biologists to conclude that the phylum Platyhel ...
Life Science Unit I Name: Date: 1. Eukaryotic cells are
Life Science Unit I Name: Date: 1. Eukaryotic cells are

... to function normally. In mammals, two organ systems work together to move oxygen throughout the body. The respiratory system brings oxygen into the body from the environment. Which of these body systems is directly involved in the delivery of oxygen to the major organs of the human body? A. ...
the body atlas - Ambrose Video
the body atlas - Ambrose Video

... A woman releases one egg every 28 days. It drifts into a fallopian tube and will be impregnated by only one of the millions of sperm which have entered her body. All of the genetic information to produce a unique human is combined from the egg and sperm. In 1 1/2 days the fertilized egg will divide ...
Lymphatic System
Lymphatic System

... ▫ Extra plasma that has been filtered out of the blood and is in the interstitial fluid may need to be returned to the blood and this can be done through the lymphatic system (lymph vessels)  Lymph vessels carry lymph in pretty much the same way that veins carry blood – using muscle contractions in ...
www.XtremePapers.com
www.XtremePapers.com

... Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included ...
Past Exam 1 for University of Minnesota students
Past Exam 1 for University of Minnesota students

... kyphosis- (humpback, hunchback) characterized by abnormal increase in thoracic curvature resulting from anterior deterioration of anterior part of one or more vertebra (Moore&Dalley 434) D. pronounced secondary curvature defect- cervical and lumbar curvatures that begin to appear during the fetal pe ...
Features Used to Classify Animals
Features Used to Classify Animals

... Further subdivision of animals with three germ layers (triploblasts) results in the separation of animals that may develop an internal body cavity derived from mesoderm, called a ...
Blood vessels
Blood vessels

... the blood always flows in the right direction. • The closing and opening of these valves can be heard as heart beats when you listen to someone’s chest. ...
BIOL242LymphImmuneVentChap20,21SEP2012
BIOL242LymphImmuneVentChap20,21SEP2012

... 1. Know the general function of the lymphatic system and the components that make up the system (cells, organs, tissues, vessels, etc.) 2. Explain how the lymphatic vessels are similar to the blood vessels (veins). Know how the lymph capillaries compare to the blood capillaries. Know where lymphatic ...
Unit 3
Unit 3

... 1. Know the general function of the lymphatic system and the components that make up the system (cells, organs, tissues, vessels, etc.) 2. Explain how the lymphatic vessels are similar to the blood vessels (veins). Know how the lymph capillaries compare to the blood capillaries. Know where lymphatic ...
< 1 ... 51 52 53 54 55 56 57 58 59 ... 165 >

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.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report