Development of the Mesodermal Organs in Vertebrates
... blood vessel). This epithelium becomes the endothelium of the blood vessel; the outer layers of the blood vessels are added much later in development. The blood vessels are originally laid down as a network. Those blood vessels through which the most blood is channeled develop into arteries & veins. ...
... blood vessel). This epithelium becomes the endothelium of the blood vessel; the outer layers of the blood vessels are added much later in development. The blood vessels are originally laid down as a network. Those blood vessels through which the most blood is channeled develop into arteries & veins. ...
The Process of Egg Formation - Purdue Extension
... egg) from the ovary and produces an egg, which is then laid. About sixty-five centimeters long, the entire oviduct is actually one organ with many parts. (Note: The word ovum refers to the yolk and blastodisc formed in the ovary, not to the entire structure enclosed within the shell.) Immature Ova: ...
... egg) from the ovary and produces an egg, which is then laid. About sixty-five centimeters long, the entire oviduct is actually one organ with many parts. (Note: The word ovum refers to the yolk and blastodisc formed in the ovary, not to the entire structure enclosed within the shell.) Immature Ova: ...
Ultrasound of the Hindfoot SCAN September 2013
... tunnel shows a ganglion (arrows) deep to the posterior tibial vessels (shown in colour). This is compressing the tibial nerve. ...
... tunnel shows a ganglion (arrows) deep to the posterior tibial vessels (shown in colour). This is compressing the tibial nerve. ...
Prof. Dr. Mahmoud Al-Dajani
... tetracycline antibiotic therapy of the pregnant woman can act as a teratogenic drug during the fetal period. ► This therapy of the woman can result in permanent tetracycline Staining of the child's teeth or primary teeth that, are developing at that time. ► This intrinsic yellow to yellow-brown stai ...
... tetracycline antibiotic therapy of the pregnant woman can act as a teratogenic drug during the fetal period. ► This therapy of the woman can result in permanent tetracycline Staining of the child's teeth or primary teeth that, are developing at that time. ► This intrinsic yellow to yellow-brown stai ...
Embryonic vascular development: immunohistochemical
... Construction of the endocardium from individual endothelial cells is the first step in heart development. Immunofluorescent labelling is first evident with the appearance of PECs at the periphery of the embryo. These cells are concentrated in angiogenic sites near the headfold on each side of a Zacc ...
... Construction of the endocardium from individual endothelial cells is the first step in heart development. Immunofluorescent labelling is first evident with the appearance of PECs at the periphery of the embryo. These cells are concentrated in angiogenic sites near the headfold on each side of a Zacc ...
Expression of axial and sonic hedgehog in wildtype and midline
... developing zehrafish up to larva stages and compare it with that of sonic hedgehog {shh}. Both genes are expressed in derivatives of all three germ layers in dynamic patterns that show substantial overlap, consistent with mutual regulatory interactions between the two genes. However, we also describ ...
... developing zehrafish up to larva stages and compare it with that of sonic hedgehog {shh}. Both genes are expressed in derivatives of all three germ layers in dynamic patterns that show substantial overlap, consistent with mutual regulatory interactions between the two genes. However, we also describ ...
Ca Ba V - VCOMcc
... These cells are no longer influenced by the AER (they stop dividing and are left behind) and begin to differentiate into skeletal components of limbs therefore, limbs grow proximal to distal (cells are left behind along the way forming the bones of arms) ...
... These cells are no longer influenced by the AER (they stop dividing and are left behind) and begin to differentiate into skeletal components of limbs therefore, limbs grow proximal to distal (cells are left behind along the way forming the bones of arms) ...
Ophiacodontidae - Dr. Stuart Sumida
... Primitive in regards to the construction of the iliac blade Outer surface of ilium associated only with appendicular muscles Iliac blade is elongated and points posteriorly (which is believed to be a primitive feature); blade increases in height anteriorly Dorsal margin of iliac blade is characteris ...
... Primitive in regards to the construction of the iliac blade Outer surface of ilium associated only with appendicular muscles Iliac blade is elongated and points posteriorly (which is believed to be a primitive feature); blade increases in height anteriorly Dorsal margin of iliac blade is characteris ...
Embryology: Images of Man - Welkom op de fenomenologie site van
... The development of the ovum Ova are created as primordial oocytes in million copies as early as in the embryonic stage and their number is gradually reduced. They lie separated from each other in follicles and are surrounded by a layer of nutritive, so called follicular cells. In the primordial foll ...
... The development of the ovum Ova are created as primordial oocytes in million copies as early as in the embryonic stage and their number is gradually reduced. They lie separated from each other in follicles and are surrounded by a layer of nutritive, so called follicular cells. In the primordial foll ...
Neurulation - Dr. Salah A. Martin
... to form a tube, the gut, and the mesoderm moves between the endoderm and ectoderm. As tubulation is completed the embryo is now at the neural plate stage (neurula) and is ready for the formation of the primary organ rudiments. The endoderm has now moved up over the roof of the archenteron and connec ...
... to form a tube, the gut, and the mesoderm moves between the endoderm and ectoderm. As tubulation is completed the embryo is now at the neural plate stage (neurula) and is ready for the formation of the primary organ rudiments. The endoderm has now moved up over the roof of the archenteron and connec ...
Downloaded - Royal Society Open Science
... coherent with the flat form and position of modern wings; however, it does not account for the complex musculature and articulations needed for flight functions. Conversely, the theory of pleural origin explains the origin of muscles and articulations as they are already contained in the leg branch ...
... coherent with the flat form and position of modern wings; however, it does not account for the complex musculature and articulations needed for flight functions. Conversely, the theory of pleural origin explains the origin of muscles and articulations as they are already contained in the leg branch ...
Body Planes, Directions, & Cavities
... To document info about pts., terms have to be used that specify regions or directions of the body Ex: to identify locations of pain or injury, write: 1 cm. laceration on the right anterior forearm, distal to the elbow. ...
... To document info about pts., terms have to be used that specify regions or directions of the body Ex: to identify locations of pain or injury, write: 1 cm. laceration on the right anterior forearm, distal to the elbow. ...
Epigenesis versus preformation: first chapter of the Russian
... In 1827 he found the ovum in the ovary of dogs; previously none other had been able to detect mature unfertilized eggs (oc>cytes)in mammalian ovaries. In the paper "De ovi mammalian et hominis genesr, he notes: 'By curiosity, I opened one of the follicles and, using a scalpel tip, took a very small ...
... In 1827 he found the ovum in the ovary of dogs; previously none other had been able to detect mature unfertilized eggs (oc>cytes)in mammalian ovaries. In the paper "De ovi mammalian et hominis genesr, he notes: 'By curiosity, I opened one of the follicles and, using a scalpel tip, took a very small ...
Topic: Reproduction Aim: Describe the stages of embryonic
... attaches to the lining of the uterus (endometrium) around the sixth day and is fully implanted by Day 10. As time progresses, one side of the blastula indents to form a gastrula. The gastrula consists of three germ layers. The three layers, known as the endoderm, mesoderm and ectoderm will start to ...
... attaches to the lining of the uterus (endometrium) around the sixth day and is fully implanted by Day 10. As time progresses, one side of the blastula indents to form a gastrula. The gastrula consists of three germ layers. The three layers, known as the endoderm, mesoderm and ectoderm will start to ...
NEUROANATOMY 6 – Limbic System The Limbic System
... • Posteriorly – by the cerebral aqueduct Above the cerebral aqueduct lies the habenula on either side and the pineal body, both of which comprise the epithalamus. Remember that the anterior group of thalamic nuclei form part of the limbic system. ...
... • Posteriorly – by the cerebral aqueduct Above the cerebral aqueduct lies the habenula on either side and the pineal body, both of which comprise the epithalamus. Remember that the anterior group of thalamic nuclei form part of the limbic system. ...
Chapter 7: Phylum Annelida
... the primitive “brain.” Note again that these structures may be hard to see, but will be visible in longitudinal microscope slides. 15. In each metamere, coming out from the nerve cord, there are three pairs of nerves. 16. In each segment between the septa is a pair of nephridia, or kidneys. They are ...
... the primitive “brain.” Note again that these structures may be hard to see, but will be visible in longitudinal microscope slides. 15. In each metamere, coming out from the nerve cord, there are three pairs of nerves. 16. In each segment between the septa is a pair of nephridia, or kidneys. They are ...
Reproduction and Development
... Some animals exhibit hermaphroditism in which an individual has both female and male reproductive systems. Hermaphroditism makes it easier to find a mate for animals that are solitary or less mobile. Hermaphrodites may – exchange gametes with other individuals or – fertilize their own eggs. ...
... Some animals exhibit hermaphroditism in which an individual has both female and male reproductive systems. Hermaphroditism makes it easier to find a mate for animals that are solitary or less mobile. Hermaphrodites may – exchange gametes with other individuals or – fertilize their own eggs. ...
chapter 27 Reproduction
... Some animals exhibit hermaphroditism in which an individual has both female and male reproductive systems. Hermaphroditism makes it easier to find a mate for animals that are solitary or less mobile. Hermaphrodites may – exchange gametes with other individuals or – fertilize their own eggs. ...
... Some animals exhibit hermaphroditism in which an individual has both female and male reproductive systems. Hermaphroditism makes it easier to find a mate for animals that are solitary or less mobile. Hermaphrodites may – exchange gametes with other individuals or – fertilize their own eggs. ...
Development of the Respiratory System
... detach along the primitive streak and migrate into the space between the epiblast and hypoblast layers as part of gastrulation. ...
... detach along the primitive streak and migrate into the space between the epiblast and hypoblast layers as part of gastrulation. ...
IX, X, XL - Journal of Cell Science
... phase, though departing from the general rule, leads on to a healthy development. But the division into three blastomeres does not occur in all the eggs of L. trapezoides, and is not indispensable to the regular progress of development. Sometimes it happens that the first two blastomeres each produc ...
... phase, though departing from the general rule, leads on to a healthy development. But the division into three blastomeres does not occur in all the eggs of L. trapezoides, and is not indispensable to the regular progress of development. Sometimes it happens that the first two blastomeres each produc ...
2. Nervous system 1 - Meninges: Dura mater, subdural space
... Lateral plate mesoderm form limb, muscles, bone and connective tissue. Limb is initiated by mesoderm, then controlled by ectoderm Digit development: Feet and hands start as flat plat, then form the hand by killing cells in zone between fingers (apoptosis). Endoderm: form organ along with mesoderm. E ...
... Lateral plate mesoderm form limb, muscles, bone and connective tissue. Limb is initiated by mesoderm, then controlled by ectoderm Digit development: Feet and hands start as flat plat, then form the hand by killing cells in zone between fingers (apoptosis). Endoderm: form organ along with mesoderm. E ...
Sensory Pathways Review - Dr. Leichnetz
... myelin-stained sections from the Haines’ Neuroanatomy Atlas. We have color images of the exact sections in Haines to use for the PPT exam. On this second practical, the sections are in order from spinal cord to thalamus. The questions will include: Identify (very few of this type) Where are the cell ...
... myelin-stained sections from the Haines’ Neuroanatomy Atlas. We have color images of the exact sections in Haines to use for the PPT exam. On this second practical, the sections are in order from spinal cord to thalamus. The questions will include: Identify (very few of this type) Where are the cell ...
Drosophila embryogenesis
Drosophila embryogenesis, the process by which Drosophila (fruit fly) embryos form, is a favorite model system for geneticists and developmental biologists studying embryogenesis. The small size, short generation time, and large brood size make it ideal for genetic studies. Transparent embryos facilitate developmental studies. Drosophila melanogaster was introduced into the field of genetic experiments by Thomas Hunt Morgan in 1909.