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Development of Chorion and placenta
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Fetal membranes are membranous/auxiliary
structures that surround or associated with vertebrate
embryo but do NOT take part in final embryo
formation.
Include:
1-Amnion.
2-Yolk sac.
3-Allantois.
4-Connecting stalk and umbilical cord.
5-Chorion
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Uploaded: 2025-09-24
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PLACENTA, FETAL MEMBRANES AND MULTIPLE GESTATION
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DEVELOPMENT OF THE CHORIONIC SAC
• Trophoblast layer of the blastocyst
• Differentiation into: – Cytotrophoblast – inner layer – Syncytiotrophoblast – outer layer
• Development of extraembryonic mesoderm
• Formation of isolated lacunae spaces which later coalesce to form one big extraembryonic cavity – renamed chorionic sac
• Chorionic sac surrounds the amniotic cavity and primary umbilical vesicle
• Expansion of chorionic sac reduces the size of umbilical vesicle
130 Pages
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Uploaded: 2025-09-24
DEVELOPMENT OF SKIN AND ASSOCIATED STRUCTURES
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INTRODUCTION
• The integumentary system consists of: – the skin – and its appendages:
• sweat glands,
• nails,
• hairs,
• sebaceous glands,
• arrector muscles of hairs (arrector pili muscles),
• mammary glands,
• teeth
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DEVELOPMENT OF AXIAL SKELETON
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The Skeleton
• Consists of–Bones, cartilage, joints, and ligaments
• Composed of 206 named bones: two
divisions–Axial skeleton (80 bones)–Appendicular skeleton (126 bones)
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Uploaded: 2025-09-24
Head and Neck development I: Pharyngeal apparatus and their derivatives
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Pharyngeal Apparatus 1
•Pharyngeal arches are rod-like thickenings of
mesoderm present in the wall of the foregut.
•The ventral ends of the arches of the right and left sides meet in the middle line in the floor of the pharynx.
•In the interval between any two arches, the endoderm (lining the pharynx) is pushed outwards to form a series of pouches - endodermal, or pharyngeal, pouches.
•They are evident in the head and neck region by 4th week
•Resemble fish gills (branchia) thus their earlier name .Branchial apparatus - derived from the Greek word
branchia or gill
•They are derived from neural crest cells
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DEVELOPMENT OF CARDIOVASCULAR SYSTEM
Outline -1: General Principles
Early development of CVS
2. Sources of cells
3. General events
4. Vasculogenesis
5. Angiogenesis
37 Pages
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DEVELOPMENT OF THE DIGESTIVE SYSTEM
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The digestive system consists of the hollow GIT and the extrinsic glands
•Name the components of the hollow GIT in order
•Name the extrinsic glands of the digestive system
•The hollow GIT develops from the primordial gut, that forms during embryonic folding
•Extrinsic glands of the digestive system develop as diverticula from the developing
gut, hence retain their connections with the GIT via their ducts
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ASSORTED END OF YEAR QUESTIONS AND ANSWERS MCQS FOR REVIEW OF UPPER LIMB
Grab a copy of questions and answers(marked or asteric ) of upper limb anatomy for your revision purposes. Be ahead of the rest by grabbing this copy.
45 Pages
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ASSORTED QUESTIONS AND ANSWERS FOR NEUROANATOMY
Grab a copy of ASSORTED QUESTIONS AND ANSWERS FOR NEUROANATOMY.
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NEUROANATOMY REVIEW
SCOPE
1. CEREBRAL CORTEX AND FUNCTIONAL LOCALIZATION
2. DIENCEPHALON
3. BASAL GANGLIA
4. LIMBIC SYSTEM
5. BLOOD SUPPLY AND VASCULAR SYNDROMES
SCOPE
1. BRAIN STEM AND CRANIAL NERVE NUCLEI
2. CEREBELLUM AND ITS PEDUNCLES
3. THE SPINAL CORD AND TRACTOLOGY
4. PATHWAY OF CSF FLOW
53 Pages
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INTRODUCTION TO NURSING SURVEILLANCE
1: INTRODUCTION TO NUTRITION SURVEILLANCE
1.1: Meaning of terms
DEFINITION OF KEY TERMS AND TERMINOLOGIES
Surveillance: It refers to the act of carefully watching someone or something especially in order to prevent or detect an occurrence of a given situation. It can also be defined as a continuous observation of a place, person, group, or ongoing activity in order to gather information:
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Biostatistics Lecture Notes
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This document provides an overview of key concepts in biostatistics and statistical methods used in health studies. It defines statistics as techniques used to draw conclusions from empirical data and introduces common statistical terms like population, sample, bias, and primary and secondary data.
84 Pages
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COMPASS 007 GRADE 7 2025 EXAMINATION WITH ANSWERS
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Do not miss a copy of the comprehnesive COMPASS 007 GRADE 7 2025 EXAMINATION WITH ANSWERS. This is a highly recommended assessment tool for your learners and for general revision purposes. Get your copy today!
57 Pages
3039 Views
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9.91 MB
Uploaded: 2025-09-23
STEGA 007 GRADE 5 2025 COMPLETE SET EXAMS WITH ANSWERS
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Get your exclusive copy of the comprehnesive STEGA 007 GRADE 5 2025 COMPLETE SET EXAMS WITH ANSWERS. This is a highly recommended assessment tool for your learners and for general revision purposes. Get your copy today!
25 Pages
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3 Downloads
4.78 MB
Uploaded: 2025-09-23
KMTC MONITORING AND EVALUATION FOR COMMUNITY HEALTH ACTIVITIES NOTES
By the end of this module, the learner should be able to: Define, the concepts in monitoring, evaluation and reporting, Discuss the various approaches and types of monitoring and evaluation, Describe CHIS tools used in monitoring and evaluation, Discuss the importance of monitoring, evaluation and reporting to the stakeholders in
community health and Demonstrate skills in monitoring, evaluation and reporting.
101 Pages
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Uploaded: 2025-09-23
DMB 2201: MEDICAL BIOCHEMISTRY NOTES
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Biochemistry is the study of the chemical basis of life. A biomolecule or biological molecule can be defined as a molecules or organic compounds essential for life. Biomolecules are organic compounds which are compounds of carbon hydrogen and oxygen but other elements include nitrogen, sulfur, phosphorus are also common.
189 Pages
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BIOCHEMISTRY LECTURE NOTES
Biomolecules are the primary building blocks of every living organism. Together, they promote different biological processes, which are necessary for life. They vary in structures and sizes. Biomolecules primarily consist of carbon, hydrogen and oxygen.
229 Pages
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ADVANCED NUTRITION BIOCHEMISTRY LECTURE NOTES
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Biochemistry is the study of the chemical processes occurring in living organisms. Biochemistry is concerned with structures and properties of biomolecules found in living systems in order to understand structure-function relationships. In addition, biochemistry is concerned with chemical transformations of biomolecules, and the energy changes associated with these transformations. These chemical transformations are collectively referred to as metabolism.
201 Pages
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Uploaded: 2025-09-23
HEALTH PROMOTION FOR COMMUNITY HEALTH & DEVELOPMENT
The first two chapters deal with the concept and principles of health education and issues related to health and human behavior. With the assumption that the health extension workers are closely working with and for the community, the general concept and ways of community participation is described in the 3rd chapter. The fourth chapter discusses on health communication.
263 Pages
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STEGA 007 GRADE 3 2025 COMBINED EXAMINATION SET
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Get a copy of the exclusive STEGA 007 GRADE 3 2025 COMBINED EXAMINATION SET. This a highly recommended resource for purposes of your revision and learner assessment. Grab a copy today!
16 Pages
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13.19 MB
Uploaded: 2025-09-23