• 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
5th Grade EOG Review - Structures and Functions of Living
5th Grade EOG Review - Structures and Functions of Living

... D. A strainer separates water from noodles similar to the way kidneys remove waste from cells. ...
Porifera and Cnidaria Student Guided Notes
Porifera and Cnidaria Student Guided Notes

... to perform a common function - ex. heart is formed of muscle and nerve tissue working together). Having many cells allows ________________ _____________________________________. Because of cell specialization the animal can be large. They can also move. This size allow stabilization of the animals i ...
animalintro - Otterville R
animalintro - Otterville R

... • The blastula INVAGINATES (folds inward at one point) • Called Gastrulation • The opening is called the blastopore • The center is the primitive gut or Archenteron ...
DEVELOPMENTOF FEMALE GENITAL SYSTEM
DEVELOPMENTOF FEMALE GENITAL SYSTEM

... allantois. During folding the dorsal part of the yolk sac is incorporated within the embryo The Primordial germ cells migrate along the dorsal mesentery to the Gonadal Ridges. During the 6th week, they are incorporated in the primary sex cords. ...
Maintaining Homeostasis
Maintaining Homeostasis

... • Variations in blood supply – Some types are well vascularized and other types have poor blood supply ...
BIOLOGY Specification
BIOLOGY Specification

... 3. Cell division and sex determination 3.1. Mitosis: a. define as nuclear division that leads to two daughter cells that have the same number of chromosomes so are genetically identical to each other and the parental cell b. recall the role of mitosis in growth of tissues by increasing cell number, ...
Cells and tissues - Dynamic Learning
Cells and tissues - Dynamic Learning

...  A cell is the basic, living, structural and functional unit of the body.  The principal parts of the cell are the cell membrane and its organelles which play specific roles in cellular growth, maintenance, repair and control.  The cell membrane encloses the cell and protects its contents. It is ...
tissues
tissues

... The gastrocoel (cavity inside the gastrula) develops into digestive cavity in most adult animals. Some animals such as the sea anemone never advance beyond the gastrula stage. In the sea anemone, the opening or blastopore becomes the opening to the gastrovascular cavity. In most animals a third germ ...
Ch 43 - Immune
Ch 43 - Immune

...  leukocytes  phagocytic white blood cells  complement system  anti-microbial proteins  inflammatory response ...
Animal Physiology
Animal Physiology

... • What this means is that they had a common ancestor with characteristics that they both have that the other animals don’t have – These predictions can be made by looking at cell structures and embryos as well as bones ...
Document
Document

... On anterior abdominal wall there are five peritoneal folds: 1. The median umbilical fold (contains the urachus); 2. The right and left medial umbilical folds (contain the obliterated umbilical arteries); 3. The right and left lateral umbilical folds (contain the inferior epigastric arteries and vei ...
Chapter 43. - Cloudfront.net
Chapter 43. - Cloudfront.net

...  leukocytes  phagocytic white blood cells  complement system  anti-microbial proteins  inflammatory response ...
Cells and Systems
Cells and Systems

... they are simply called type 1 and type 2 diabetes. Type 1, which occurs in approximately 10 percent of all cases, is an autoimmune disease in which the immune system, by mistake, attacks its own insulinproducing cells so that insufficient amounts of insulin are produced - or no insulin at all. Type ...
Cells and Reproduction
Cells and Reproduction

... Imagine you have unlocked the part of your brain that remembers being in the uterus. What does it look like? What can you hear? Your task is to write an imaginative essay, starting with your creation as a single cell and describing your journey to becoming a little baby held for the first time by yo ...
Defense ALL- Mus Skel Integ Imm Lymph 2016
Defense ALL- Mus Skel Integ Imm Lymph 2016

... Have a well developed Endoskeleton or internal skeleton made of calcified plates. ...
answer_1 - Homework Market
answer_1 - Homework Market

... 9. This passageway divides into two , which upon entering the lungs, continue to divide into smaller until they ultimately divide into ...
introduction to body structure
introduction to body structure

... An embryonic stem cell can become ANY TYPE OF TISSUE IN THE BODY. The use of human embryonic stem cells is CONTROVERSIAL. WHY? ...
Animals: - This is just a sample and may not include all topics or may
Animals: - This is just a sample and may not include all topics or may

... reaction of the autonomic nervous system. When we feel thirsty after eating ice cream, which part of the nervous system is responding? a. hypothalamus c. medulla oblongata b. pons d. parasympathetic nervous system How would your nervous system respond if you encountered a bear on a hiking trail? a. ...
File
File

... intestinal organs, sperm with whip-like tails, porous bone cells 6. Examples: sperm tails allow sperm to move; long extensions of nerve cells allow them to communicate with other cells; bone cells are porous to allow nutrients to reach bones; epithelial cells are closely packed to provide more surfa ...
06 Immunity
06 Immunity

...  leukocytes  phagocytic white blood cells  complement system  anti-microbial proteins  inflammatory response ...
Chapter 9 Study Guide - Burlington
Chapter 9 Study Guide - Burlington

... of stimulus. c) Each receptor cell monitors a specific receptive field. d) Sensory information is relayed in the form of action potentials in a sensory (afferent) fiber. In general, the larger the stimulus, the greater is the frequency of action potentials. The CNS interprets the nature of the arriv ...
Chemoreception
Chemoreception

... The gustatory cells SYNAPSE with the AFFERENT GUSTATORY NERVE FIBRES. These are the FACIAL, GLOSSOPHARYNGEAL and VAGAL nerves. FACIAL NERVE – information from extra-oral surface - that is, from the lips GLOSSOPHARYNGEAL NERVE - information from the anterior part of the oral ...
Multicellularity
Multicellularity

... P granules, then, are an example of an autonomous signal, which is present only in cells that can trace their lineage back to the P4 cell. The P4 cell was generated by a series of asymmetric cell divisions in which the P granules were only inherited by one of the two daughter cells. Again, you do n ...
Unit 5: Animals – Sponges, Cnidarians, & Worms
Unit 5: Animals – Sponges, Cnidarians, & Worms

... (“pore bearer”) • Simplest of all animals • Asymmetrical animals that live in shallow waters • Sessile filter-feeders whose bodies have many pores • Obtain oxygen by filtering water • No nervous system or organ systems • No tissue organization ...
Anatomical Terms and Positions
Anatomical Terms and Positions

... The patient is facing you…. So his right is your? ...
< 1 ... 76 77 78 79 80 81 82 83 84 ... 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