• 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
LabPracticalIBio242LGRCC
LabPracticalIBio242LGRCC

... The white/light pink cells found clustered in the center of this photomicrograph are part of a larger endocrine/exocrine gland that secretes enzymes into the small intestine. This gland is found attached to the inferior border of the stomach. ...
Chapter 28 Animal Tissue and Organ Systems
Chapter 28 Animal Tissue and Organ Systems

... 28.3 What Is Epithelial Tissue? • Epithelial tissue: sheetlike tissue consisting of tightly packed cells with little extracellular material between them – One surface of an epithelium faces the environment or some body fluid – The opposite surface is glued to an underlying tissue by a basement memb ...
Microsoft Word 97 - 2003 Document
Microsoft Word 97 - 2003 Document

... Studies of animal transport or circulatory systems have been going on from very early times. From the Greek Galen's 2nd century ideas of blood simply "ebbing and flowing like the tides" in animal bodies, we have been adding to our knowledge continuously. Notable landmarks were achieved in the 17th c ...
Notes: Cnidaria - Staff Web Pages
Notes: Cnidaria - Staff Web Pages

... • two cells layers allows easy diffusion of: - Oxygen dissolved in water, it can diffuse directly into body cells. - Carbon dioxide /other wastes moves out of the body cells directly into the surrounding water. ...
Gut Development
Gut Development

... • Early Development - gastrulation (a reminder) • Endoderm • Gut development and genetics • Gut nervous innervation: Hirschsprung’s disease ...
The Nasal Cavity
The Nasal Cavity

... ≡ The roof of the nasal cavity is formed by several bones. From front to back these are parts of the nasal bone, the frontal bone, the cribriform plate of the ethmoid and the anterior surface of the body of the sphenoid bone. ≡ The medial wall or nasal septum is formed in its upper part by the perp ...
Areolar Connective Tissue
Areolar Connective Tissue

... and bind adjacent cells • With tight junctions, these linker proteins form the tight junctional complex around apical lateral borders of epithelial tissues Lateral Surface Features ...
Tissues Power Point - Paulding County Schools
Tissues Power Point - Paulding County Schools

... keratinized stratified squamous epithelium (epidermis) firmly attached to a thick connective tissue layer (dermis) Uniquely different b/c it is exposed to air and is a dry membrane ...
All About Blood - Spark Innovations
All About Blood - Spark Innovations

... the blood vessels and the water enters your blood stream and makes up part of your plasma. Put all these ingredients together and you have blood — an essential part of the circulatory system. Thanks to your heart (which pumps blood) and your blood vessels (which carry it), blood travels throughout ...
Chapter 4: Tissues and Membranes Theory Lecture Outline
Chapter 4: Tissues and Membranes Theory Lecture Outline

... • Classification of epithelia. Epithelia are classified by their function, as either mucous or serous membranes, depending on the type of secretions produced. Epithelia are also classified according to cell shape and the number of layers in the tissue. • Epithelial Functions and Shapes: a. Covering ...
Nasal Part
Nasal Part

... are found within these bones. They are called the paranasal sinuses. ...
Bones of the Skull
Bones of the Skull

... which forms the prominence of the cheek Mandibular fossa: articular point of the mandibular condyle External acoustic meatus: canal leading from the external ear to the eardrum Styloid process: attachment site for hyoid bone and several neck muscles Mastoid process: attachment site for several neck ...
File
File

... membrane vesicles, formed from the endoplasmic reticulum. Its job is to transport proteins destined for extracellular use from the ER to the cell membrane for export. Parts of the RER containing proteins fuse with one side of the Golgi body membranes, while at the other side small vesicles bud off a ...
tissues
tissues

... job and this one job well. This is called division of labor. ...
Syllabus 2011-2012
Syllabus 2011-2012

... your future clinical classes. This course will be time-consuming but well worth the time and effort you spend on it. I'm sure that you will find the study of the body a fascinating subject. LCCC Credit In order to earn articulated LCCC college credit, the following conditions must be met: ...
16-2 The Sympathetic Division
16-2 The Sympathetic Division

... o Exchange of ions and molecules between adjacent cells across gap junctions o Occurs between two cells of same type o Highly specialized and relatively rare Paracrine Communication o Uses chemical signals to transfer information from cell to cell within single tissue o Most common form of intercell ...
BIOL 105 S 2013 Midterm Exam 1 Q 130311.5
BIOL 105 S 2013 Midterm Exam 1 Q 130311.5

... 38. The complex structures of DNA and protein found in the cell nucleus are A) nucleoplasm. D) nucleases. B) chromosomes. E) mitochondria. C) histones. 39. The movement of oxygen from an area of high concentration to an area of low concentration is an example of A) osmosis. D) facilitated transport. ...
Tissue:
Tissue:

... – Apical surfaces can be smooth, most have microvilli, and some have cilia – The basal surface of epithelium is called the basal lamina, which acts as a selective filter that determines which molecules are allowed to enter the epithelium ...
Slide ()
Slide ()

... tongue. Both are covered with stratified squamous epithelium. The pharyngeal tonsil is a single medial mass situated in the posterior wall of the nasopharynx. It is usually covered by ciliated pseudostratified columnar epithelium, but areas with stratified epithelium can also be observed. Hypertroph ...
Evolution of Vertebrates
Evolution of Vertebrates

... buccal cavity glottis closed ...
42. Lungs, pleura
42. Lungs, pleura

...  Type II alveolar cells (septal cells) – free surfaces contain microvilli, secrete alveolar fluid (surfactant reduces tendency to collapse) ...
Breast and Pelvic Anatomy
Breast and Pelvic Anatomy

... The round ligament is not truly a ligament, as it is a coalescence of the visceral peritoneum forming a ligament– appearing structure between the superior–anterior surface of the body of the uterus, to the pelvic wall (exiting  at the inguinal fossa).  ...
COMPLETE BIOLOGY Table of contents I. Chemistry II. Cells III
COMPLETE BIOLOGY Table of contents I. Chemistry II. Cells III

... the above. Chad’s quiz says transport use ATP but other sources contradict: transport can by facilitated diffusion. **- Adhesion proteins: attach cells to neighboring cells, provide anchors for internal filaments and tubules (stability) - Receptor proteins: binding site for hormones + other trigger ...
Invertebrate Evolution
Invertebrate Evolution

... Ancestors of modern roundworms were the first animals to evolve a complete digestive system. With a separate mouth and anus, food could move through the body in just one direction. This made digestion more efficient. An animal could keep eating while digesting food and getting rid of waste. Differen ...
Licensed to: iChapters User
Licensed to: iChapters User

... such as the digestive tract lumen. (A lumen is the cavity within a hollow organ or tube.) Only selective transfer of materials is possible between regions separated by an epithelial barrier. Each cell performs these specialized activities in addition to The type and extent of controlled exchange var ...
< 1 ... 26 27 28 29 30 31 32 33 34 ... 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