The Umbilical Cord and Body- stalk. The umbilical cord (Fig. 28
... while its ventral surface is bounded by the extraembryonic celom, and is in contact with the vitelline duct and yolk-sac. • With the rapid elongation of the embryo and the formation of the tail fold, the body stalk comes to lie on the ventral surface of the embryo (Figs. 27 and 28), where its mesode ...
... while its ventral surface is bounded by the extraembryonic celom, and is in contact with the vitelline duct and yolk-sac. • With the rapid elongation of the embryo and the formation of the tail fold, the body stalk comes to lie on the ventral surface of the embryo (Figs. 27 and 28), where its mesode ...
Practice Quiz
... 11. The concentric rings observed in a typical cross-section through bone are called ____________________. 12. ___________________ muscle is involuntary and lacks striations. 13. ____________________ processes of the neuron always transmit impulses towards the cell body. 14. Dense connective tissue ...
... 11. The concentric rings observed in a typical cross-section through bone are called ____________________. 12. ___________________ muscle is involuntary and lacks striations. 13. ____________________ processes of the neuron always transmit impulses towards the cell body. 14. Dense connective tissue ...
Leaf Anatomy - Lemon Bay High School
... the palisade layer and the lower epidermis. The air spaces between the spongy cells allow for gas exchange. Mesophyll cells (both palisade and spongy) are packed with chloroplasts, and this is where photosynthesis actually occurs. Epidermis also lines the lower area of the leaf (as does the cuticle) ...
... the palisade layer and the lower epidermis. The air spaces between the spongy cells allow for gas exchange. Mesophyll cells (both palisade and spongy) are packed with chloroplasts, and this is where photosynthesis actually occurs. Epidermis also lines the lower area of the leaf (as does the cuticle) ...
Animal Characteristics
... • It is an advantage because a more complex animal can respond to an environment more quickly. ...
... • It is an advantage because a more complex animal can respond to an environment more quickly. ...
Introduction to Embryology of Chordata
... Determination comes fairly quickly in Amphioxus. Recall that as a deuterostome, cleavage is radial and initially indeterminate. Determination does come fairly quickly however. In urochordates it can be as early as the 8cell stage. Endoderm lies near the bottom of the egg, which is heavier because al ...
... Determination comes fairly quickly in Amphioxus. Recall that as a deuterostome, cleavage is radial and initially indeterminate. Determination does come fairly quickly however. In urochordates it can be as early as the 8cell stage. Endoderm lies near the bottom of the egg, which is heavier because al ...
Chapter 15: Reproductive system
... ______________: is a clear fluid in which the embryo, and then the fetus, is suspended. ______________: a fluid-filled cavity. ______________: is the last stage of birth in which the placenta detaches from the uterine wall and is expelled. ...
... ______________: is a clear fluid in which the embryo, and then the fetus, is suspended. ______________: a fluid-filled cavity. ______________: is the last stage of birth in which the placenta detaches from the uterine wall and is expelled. ...
340Lecture06 - Dr. Stuart Sumida
... Determination comes fairly quickly in Amphioxus. Recall that as a deuterostome, cleavage is radial and initially indeterminate. Determination does come fairly quickly however. In urochordates it can be as early as the 8cell stage. Endoderm lies near the bottom of the egg, which is heavier because al ...
... Determination comes fairly quickly in Amphioxus. Recall that as a deuterostome, cleavage is radial and initially indeterminate. Determination does come fairly quickly however. In urochordates it can be as early as the 8cell stage. Endoderm lies near the bottom of the egg, which is heavier because al ...
Circulatory System - Central New England Pony Club
... 4 chambers – left and right atria (upper chambers) and left and right ventricles (lower chambers) Dark red deoxygenated blood, carrying CO2, arrives from the cells via the vena cava (vein) Collects in right atrium (upper) and is pumped down into right ventricle through one-way valve Pulmonary artery ...
... 4 chambers – left and right atria (upper chambers) and left and right ventricles (lower chambers) Dark red deoxygenated blood, carrying CO2, arrives from the cells via the vena cava (vein) Collects in right atrium (upper) and is pumped down into right ventricle through one-way valve Pulmonary artery ...
The Circulatory System
... pump, simultaneously pumping blood to and from body cells through the systemic circulation and to and from the lungs in the pulmonary circulation ...
... pump, simultaneously pumping blood to and from body cells through the systemic circulation and to and from the lungs in the pulmonary circulation ...
Cell Specialization Powerpoint
... humans, are made of specialized cells, tissues, and organs that are organized into systems. ...
... humans, are made of specialized cells, tissues, and organs that are organized into systems. ...
Cells and Basketball
... When you shoot a basketball many parts of your body work together to help you make the shot! These different parts are made up of different tissues and cells. Each type of cell is specialized to perform its job in shooting a basketball. Cells can be specialized in their shape and the organelles that ...
... When you shoot a basketball many parts of your body work together to help you make the shot! These different parts are made up of different tissues and cells. Each type of cell is specialized to perform its job in shooting a basketball. Cells can be specialized in their shape and the organelles that ...
Reproductive
... Eumetazoa - animals with tissue – Bilateria - have bilateral symmetry Head end-cephalization Tail end Right and left side Top (dorsal) and bottom (ventral) triploblastic -ectoderm, mesoderm, endoderm. Protostomia - a group of animals whose mouth develops from the blastopore, and the mesoderm forms f ...
... Eumetazoa - animals with tissue – Bilateria - have bilateral symmetry Head end-cephalization Tail end Right and left side Top (dorsal) and bottom (ventral) triploblastic -ectoderm, mesoderm, endoderm. Protostomia - a group of animals whose mouth develops from the blastopore, and the mesoderm forms f ...
Game from today on animals
... 10. What type of symmetry is found in sponges? (asymmetry) 11. What cavity allows for organ development? (coelom) 12. What is the 8 cell stage for humans called? (blasocyst) 13. What type of animal is a fluke? (flatworm/platyhelminthes) 14. What phylum has a pseudocoleom? (nematode) 15. Which of the ...
... 10. What type of symmetry is found in sponges? (asymmetry) 11. What cavity allows for organ development? (coelom) 12. What is the 8 cell stage for humans called? (blasocyst) 13. What type of animal is a fluke? (flatworm/platyhelminthes) 14. What phylum has a pseudocoleom? (nematode) 15. Which of the ...
Ch 8 study guide Tuesday, February 14, 2017 9:53 AM What is the
... What happens to the intraembryonic coelom during the folding of the embryonic disc in the 4th week? ...
... What happens to the intraembryonic coelom during the folding of the embryonic disc in the 4th week? ...
Cells Unit Study Guide
... that carries out the functions of life. Tissues are groups of similar cells performing the same function. Organs are groups of different tissues that work together to perform a major function. Organ system are a group of different organs working together to carry out a particular function. 3. What i ...
... that carries out the functions of life. Tissues are groups of similar cells performing the same function. Organs are groups of different tissues that work together to perform a major function. Organ system are a group of different organs working together to carry out a particular function. 3. What i ...
BIO 101 Chapter 1 Lecture Notes * WHAT IS LIFE?
... BIO 101 Chapter 1 Lecture Notes – WHAT IS LIFE? I. ...
... BIO 101 Chapter 1 Lecture Notes – WHAT IS LIFE? I. ...
The!cell!
... Consist!of!cells!that!line!all!body!surfaces,!cavities!and!tubes,!al!epithelial!tissues! therefore!have!one!surface!exposed,!and!the!other!surface!attached!to!a!nonL cellular!layer!(basement!membrane).!This!membrane!attaches!the!epithelium!to! underlying!tissues.! Epithelia!are!classified!according! ...
... Consist!of!cells!that!line!all!body!surfaces,!cavities!and!tubes,!al!epithelial!tissues! therefore!have!one!surface!exposed,!and!the!other!surface!attached!to!a!nonL cellular!layer!(basement!membrane).!This!membrane!attaches!the!epithelium!to! underlying!tissues.! Epithelia!are!classified!according! ...
Unit 5 Cellular & Organismal Reproduction
... The stages of mitotic cell division in an animal cell: metaphase; anaphase; telophase and cytokinesis. ...
... The stages of mitotic cell division in an animal cell: metaphase; anaphase; telophase and cytokinesis. ...
TAKS Review - Greenslime
... – Primary: start with no ecosystem existing; 1st— pioneer species (lichens & mosses) then grasses, shrubs and finally trees – Secondary: occur after a disturbance such as farming or logging; regrowth of grasses, shrubs, small then larger trees ...
... – Primary: start with no ecosystem existing; 1st— pioneer species (lichens & mosses) then grasses, shrubs and finally trees – Secondary: occur after a disturbance such as farming or logging; regrowth of grasses, shrubs, small then larger trees ...
Notes
... • Require host to carry on life cycle – see next slide • Primary host – infect as adult • Secondary host – infect as larval stage • Tapeworm – • Scolex with hooks and suckers to hold itself inside the gut. • No digestive system; absorbs host’s digested food through skin ...
... • Require host to carry on life cycle – see next slide • Primary host – infect as adult • Secondary host – infect as larval stage • Tapeworm – • Scolex with hooks and suckers to hold itself inside the gut. • No digestive system; absorbs host’s digested food through skin ...
6.2 Respiration gas exchange - HIS-IGSci-Bio
... make the heart beat faster and the small arteries narrow – thus increasing blood pressure. nicotine increases the stickiness of blood platelets Use p164-165 to describe the effects of the other components of smoke on our bodies: ...
... make the heart beat faster and the small arteries narrow – thus increasing blood pressure. nicotine increases the stickiness of blood platelets Use p164-165 to describe the effects of the other components of smoke on our bodies: ...
Cells and Systems Unit Test
... The Pika was described in the text as an example of a multi-cellular organism that is able to survive because of the habits and the environment of the organism, which direct the way that cells are organized. The special baglike chamber, where chewed and semidigested food collects, enable these, to h ...
... The Pika was described in the text as an example of a multi-cellular organism that is able to survive because of the habits and the environment of the organism, which direct the way that cells are organized. The special baglike chamber, where chewed and semidigested food collects, enable these, to h ...
Developmental Anatomy
... hatching of blastocyst: ~ day 5- 6 3. Implantation: a process of the blastocyst embedding into the endometrium 1) Time: Day 5 - 6 to Day 11 - 12 2) Site: posterior or anterior wall of uterine body 3) Process: adhesion, expansion, dissolution, invasion, differentiation, repair 4) The main changes dur ...
... hatching of blastocyst: ~ day 5- 6 3. Implantation: a process of the blastocyst embedding into the endometrium 1) Time: Day 5 - 6 to Day 11 - 12 2) Site: posterior or anterior wall of uterine body 3) Process: adhesion, expansion, dissolution, invasion, differentiation, repair 4) The main changes dur ...
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.