• 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
Biology 11
Biology 11

... •phylum Cnidaria gets its name from the stinging cell (cnidocyte) that is found all members •the cnidocyte contains a stinging structure called a ________________ •all cnidarians are _______-bodied animals with stinging ______________ arranged around their mouth B. Body Forms: Polyp and Medusa •both ...
Class - Educast
Class - Educast

... Tube: Connects the eyepiece to the objective lenses Arm: Supports the tube and connects it to the base Base: The bottom of the microscope, used for support Illuminator: A steady light source (110 volts) used in place of a mirror. If your microscope has a mirror, it is used to reflect light from an e ...
PART - Humble ISD
PART - Humble ISD

... Mechanics of Breathing Draw a diagram illustrating what the diaphragm and chest cavity do during the following processes. ...
Chapter 43.
Chapter 43.

...  pathogens: viruses, bacteria, protozoa, parasitic worms, ...
Sperm Release Pathway: The Parasympathetic Step
Sperm Release Pathway: The Parasympathetic Step

... • Oocyte (w/ corona radiata) expelled from ovary! ...
Unit VII: Animal Structure and Function, Part I
Unit VII: Animal Structure and Function, Part I

... • Digestive System: mouth … anus ...
Chapter 31 - Mr. Krall
Chapter 31 - Mr. Krall

... Name ____________________________ ...
Bi 212, Lab 1
Bi 212, Lab 1

... section based on the parts you could see for each. Specific tissue layers best seen in cross-section. Be sure also to label all places where you have epidermis, mesoderm and gastrodermis (i.e. both the pharynx and the body itself). a. epidermis derived from ectoderm (multiple places in cross-section ...
EUMETAZOA = true animals
EUMETAZOA = true animals

... -tissues that works together to particular biological function -can be grouped to organ system for example circulatory, digestive, ...
Topic One: Chemistry of Living Things
Topic One: Chemistry of Living Things

... B) Humans grow as a result of ______________(cell division). 1. This quickly increases the number of cells in the body until there many trillions of cells. 2. Since all new cells come from the same single cell, they all share the same __________. C) As cells divide, they begin to develop into speci ...
Human Body Systems
Human Body Systems

... hormone that stimulates sperm production and the growth of facial hair and other male features. ...
Turn in Body system story/brochure
Turn in Body system story/brochure

... Turn in Body system story/brochure (two minutes after the bell, it is late) ...
Immunity 2
Immunity 2

...  leukocytes  phagocytic white blood cells  complement system  anti-microbial proteins  inflammatory response ...
Ch. 47 Lecture Notes - Mrs. Perry`s Biology
Ch. 47 Lecture Notes - Mrs. Perry`s Biology

... during fertilization and the three stages that build the animal’s body – Cleavage: cell division creates a hollow ball of cells called a blastula – Gastrulation: cells are rearranged into a threelayered gastrula – Organogenesis: the three layers interact and move to give rise to organs Copyright © 2 ...
Animals intro
Animals intro

... form various tissues and organs, differs between radiata and bilateria. The radiata are said to be diploblastic because they have two germ layers. – The ectoderm, covering the surface of the embryo, give rise to the outer covering and, in some phyla, the central nervous system. – The endoderm, the i ...
National 5 Biology Unit 2: Multicellular Life Key Area 1: Cells
National 5 Biology Unit 2: Multicellular Life Key Area 1: Cells

... I can give examples of specialised cells and how they are adapted to suit their function. I know that tissues are made up from multiple cells of the same type. I can give examples of tissues in the human body. I know that organs are structures made up of a variety of tissues in order to perform a sp ...
Power Point Presentation
Power Point Presentation

... Two general principles underlie differentiation: 1. During early cleavage divisions, embryonic cells must become different from one another  If the egg’s cytoplasm is heterogenous, dividing cells vary in the cytoplasmic determinants they contain ...
Chapter 22
Chapter 22

... contains inner and outer hair cells (i.e., mechanoreceptors) with hairlike processes called stereocilia (specialized microvilli that form a hair bundle) that detect auditory stimulation; the bases of the hair cells synapse with firstorder sensory neurons and with motor neurons from the cochlear bran ...
Emergency Medical Training Services
Emergency Medical Training Services

... 1. Capillary sphincters – are located just before the capillary and just after leaving the capillary. ...
Animal Phylum poster Porifera
Animal Phylum poster Porifera

... Sessile (motile larval phase) ...
ANIMALIA
ANIMALIA

... coelom not totally lined by mesoderm • Phylum Nematoda (roundworms) • coelom (coelomates): coelom totally lined by mesoderm • 5 other Phyla (of 9) ...
File
File

... DNA) get, "____________________". Those genes that are required to carry out their specific job (ex. muscle cell) remain "turned on" and will remain that way for the cells entire life. It does not normally change to become a different type of cell. Stem Cells Stem cells are _____________________ cel ...
File
File

... 3. The terms in order of increasing complexity are tissue, organ, and system. 4. Answers will vary. Examples of tissue include nerve tissue, muscle tissue, and connective tissue. Examples of organs include skin, heart, liver, lungs, stomach, and intestines. Examples of systems include the circulator ...
Chapter 3 The Basic Structure of a Cell - GMCbiology
Chapter 3 The Basic Structure of a Cell - GMCbiology

... nucleus or membrane-bound structures called organelles – small single-celled Eukaryotes include most other cells & have a nucleus and membrane-bound organelles (plants, fungi, & animals) – larger than prokaryotes and can be either unicellular or multicellular ...
cell - Shelton State
cell - Shelton State

... composed of several cell layers; basal cells are cuboidal or columnar and metabolically active; surface cells are flattened (squamous); in the keratinized type, the surface cells are full of keratin and dead; basal cells are active in mitosis and produce the cells of the more superficial layers. ...
< 1 ... 90 91 92 93 94 95 96 97 98 ... 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