Dissection Guide for the Clam (Mussel) 07
... shell. In this investigation you will observe the external and are needed to see t his picture. internal structures of a representative mollusk--the clam or fresh-water mussel. Clams are pelecypods, or bivalves, and have a two-part hinged shell. Clams are found in fresh water in streams, ponds, and ...
... shell. In this investigation you will observe the external and are needed to see t his picture. internal structures of a representative mollusk--the clam or fresh-water mussel. Clams are pelecypods, or bivalves, and have a two-part hinged shell. Clams are found in fresh water in streams, ponds, and ...
Earthworm Dissection Lab draft
... Earthworm Dissection © John R. Sowash | April 2009 | Permission to redistribute granted Pre-lab Discussion: The earthworm belongs to a group of animals called annelids (segmented worms). The body of an annelid is usually divided internally and externally into well-defined segments which may be separ ...
... Earthworm Dissection © John R. Sowash | April 2009 | Permission to redistribute granted Pre-lab Discussion: The earthworm belongs to a group of animals called annelids (segmented worms). The body of an annelid is usually divided internally and externally into well-defined segments which may be separ ...
Name
... 7. Describe two ways in which an earthworm’s body is adapted to life in the soil. ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ 8. Imagine an assembly line for dis ...
... 7. Describe two ways in which an earthworm’s body is adapted to life in the soil. ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ 8. Imagine an assembly line for dis ...
11. Earthworm Dissection
... 6. The ventral surface of the earthworm is usually a lighter colour than the dorsal surface. The mouth is located on the ventral surface of the first segment while the anus is found at the end of the last segment. 7. Look for the worm’s setae, which are the minute bristle‐like spines located ...
... 6. The ventral surface of the earthworm is usually a lighter colour than the dorsal surface. The mouth is located on the ventral surface of the first segment while the anus is found at the end of the last segment. 7. Look for the worm’s setae, which are the minute bristle‐like spines located ...
- ISpatula
... The protists were autotrophic. The protists were prokaryotic. Animals are able to reproduce. The protists were heterotrophic. Animals have more cells than their protist ancestors, and their cells show greater specialization. ...
... The protists were autotrophic. The protists were prokaryotic. Animals are able to reproduce. The protists were heterotrophic. Animals have more cells than their protist ancestors, and their cells show greater specialization. ...
Earthworm Dissection Lab Instructions
... 5. Turn the worm dorsal side up. Using a scalpel and scissors, make a shallow incision in the dorsal side of the clitellum at segment 33. CAUTION: Scalpels and scissors are very sharp. Only touch sharp end of scalpels on worm. Report any cuts to your teacher. Using the forceps and scalpel, spread t ...
... 5. Turn the worm dorsal side up. Using a scalpel and scissors, make a shallow incision in the dorsal side of the clitellum at segment 33. CAUTION: Scalpels and scissors are very sharp. Only touch sharp end of scalpels on worm. Report any cuts to your teacher. Using the forceps and scalpel, spread t ...
Name
... a. The ventral (belly) side appears flatter and lighter in color than the other sides of the earthworm. b. The dorsal (back) side is the worm’s rounded top and is darker in color. 2. Identify the anterior and posterior ends of the earthworm. a. The anterior (head) end is slightly pointed and is clos ...
... a. The ventral (belly) side appears flatter and lighter in color than the other sides of the earthworm. b. The dorsal (back) side is the worm’s rounded top and is darker in color. 2. Identify the anterior and posterior ends of the earthworm. a. The anterior (head) end is slightly pointed and is clos ...
Glossary Glossary Preface
... Alveolus (pl. Alveoli) One of many flattened vesicles that form a more or less continuous layer beneath the cell membrane of ciliates and a few other protozoans. Ambulacrum (pl. Ambulacra) Groove, ridge, or double band of tube feet, radial canal, and associated body wall of echinoderms. Ametabolous ...
... Alveolus (pl. Alveoli) One of many flattened vesicles that form a more or less continuous layer beneath the cell membrane of ciliates and a few other protozoans. Ambulacrum (pl. Ambulacra) Groove, ridge, or double band of tube feet, radial canal, and associated body wall of echinoderms. Ametabolous ...
Amphioxis
... nerve cord (neurocoel) is expanded anteriorly to form a vesicle sometimes referred to as the brain. Ventral to the nerve cord is the notochord. It is longer, relative to the length of the body, in these animals than in any other chordate. It is longer than the nerve cord and extends well into the ro ...
... nerve cord (neurocoel) is expanded anteriorly to form a vesicle sometimes referred to as the brain. Ventral to the nerve cord is the notochord. It is longer, relative to the length of the body, in these animals than in any other chordate. It is longer than the nerve cord and extends well into the ro ...
s1-human-reproduction-and-development
... Human reproduction and early development some questions? Where did you come from? What were the cells involved in making you? How did you develop from first cells to birth? ...
... Human reproduction and early development some questions? Where did you come from? What were the cells involved in making you? How did you develop from first cells to birth? ...
Abdominopelvic Cavity
... divides a structure into superior and inferior portions; also called a horizontal, or cross section ...
... divides a structure into superior and inferior portions; also called a horizontal, or cross section ...
Arthropod Glossary With Emphasis On Spiders, Scorpions, and Insects
... cephalization - The evolutionary trend of the concentration of sensory and other nervous system tissue in the head region of animals. cephalothoracic mass - The brain of a scorpion, a large neural structure in the cephalothorax, beneath the eyes. cephalothorax - A body region consisting of head and ...
... cephalization - The evolutionary trend of the concentration of sensory and other nervous system tissue in the head region of animals. cephalothoracic mass - The brain of a scorpion, a large neural structure in the cephalothorax, beneath the eyes. cephalothorax - A body region consisting of head and ...
Blue Crab Dissection 2016
... and slightly more rounded teeth. This may be reversed in some individuals and it is more pronounced in many other crab species. What would be the advantage of these two different types of claws? ...
... and slightly more rounded teeth. This may be reversed in some individuals and it is more pronounced in many other crab species. What would be the advantage of these two different types of claws? ...
Lab 3: INSECT EXTERNAL MORPHOLOGY
... 2. Place specimen ventral side down in dissecting tray. 3. Insert the tip of your scissors between two abdominal segments close to the ‘tail end’ on the lateral side of the roach. 4. CAREFULLY cut the exoskeleton (making certain not to puncture internal organs) from the point of insertion anteriorly ...
... 2. Place specimen ventral side down in dissecting tray. 3. Insert the tip of your scissors between two abdominal segments close to the ‘tail end’ on the lateral side of the roach. 4. CAREFULLY cut the exoskeleton (making certain not to puncture internal organs) from the point of insertion anteriorly ...
f the allantois grow out into the the blood vdesse s. onts diffusing
... of the chorion, and become the arteries of the placenta. • The Somites and Their Derivatives The formation of the notochord in a chordate embryo starts the process of segmentation. The mesoderm on either side of the notochord soon condenses into a series of blocks known as somites (Fig. 1-SB). In pr ...
... of the chorion, and become the arteries of the placenta. • The Somites and Their Derivatives The formation of the notochord in a chordate embryo starts the process of segmentation. The mesoderm on either side of the notochord soon condenses into a series of blocks known as somites (Fig. 1-SB). In pr ...
Diversity – Eukarya – Kingdom Animalia
... Gastrulation • Rearrangement of the blastula to form a 3 layered (germ layers) embryo with a gut • Blastula cells begin to infold forming the gut (digestive system) – Vegetal pole (future endoderm, divide slowly) – Animal pole (future mesoderm & ectoderm, divide rapidly) – Invagination forms arc ...
... Gastrulation • Rearrangement of the blastula to form a 3 layered (germ layers) embryo with a gut • Blastula cells begin to infold forming the gut (digestive system) – Vegetal pole (future endoderm, divide slowly) – Animal pole (future mesoderm & ectoderm, divide rapidly) – Invagination forms arc ...
Chapter 34A
... All chordates have some sort of tail posterior to the anus: • may be greatly reduced during embryonic development in some species (e.g., Homo sapiens) • contains skeletal and muscle elements that may play a role in propulsion (aquatic species) or balance & support (terrestrial species) Post-anal tai ...
... All chordates have some sort of tail posterior to the anus: • may be greatly reduced during embryonic development in some species (e.g., Homo sapiens) • contains skeletal and muscle elements that may play a role in propulsion (aquatic species) or balance & support (terrestrial species) Post-anal tai ...
Phylum: Annelida
... -cylindrical elongated segmented bodies; segments divided by septa -well developed true coelom -closed circulatory system with one to several hearts and dorsal and ventral vessels -more efficient excretory system of nephridia -well developed muscular system with circular and longitudinal muscle laye ...
... -cylindrical elongated segmented bodies; segments divided by septa -well developed true coelom -closed circulatory system with one to several hearts and dorsal and ventral vessels -more efficient excretory system of nephridia -well developed muscular system with circular and longitudinal muscle laye ...
detailed lecture outline
... At fertilization, the diameter of the secondary oocyte is more than twice the entire length of the spermatozoon. The spermatozoa deposited in the vagina are already motile, as a result of contact with secretions of the seminal vesicles—the first step of capacitation. The spermatozoa, however, cann ...
... At fertilization, the diameter of the secondary oocyte is more than twice the entire length of the spermatozoon. The spermatozoa deposited in the vagina are already motile, as a result of contact with secretions of the seminal vesicles—the first step of capacitation. The spermatozoa, however, cann ...
RevLessAQA_GCSESciB1_7PPt
... female gametes. This mixing of the genetic information of two parents leads to genetic variation in the offspring. • Asexual reproduction involves only one parent and the offspring are genetically identical (clones). Give an example of sexual and asexual reproduction. ...
... female gametes. This mixing of the genetic information of two parents leads to genetic variation in the offspring. • Asexual reproduction involves only one parent and the offspring are genetically identical (clones). Give an example of sexual and asexual reproduction. ...
Chapter 10 Mendel and Meiosis
... • A cell with two of each kind of chromosomes is called a diploid cell and is said to contain a diploid, or 2n , number chromosomes. • Organisms produce gametes that contain one of each kind of chromosome, a cell with one each kind of chromosome is called a haploid cell and is said to contain a hap ...
... • A cell with two of each kind of chromosomes is called a diploid cell and is said to contain a diploid, or 2n , number chromosomes. • Organisms produce gametes that contain one of each kind of chromosome, a cell with one each kind of chromosome is called a haploid cell and is said to contain a hap ...
EXTRAEMBRYONIC MEMBRANE
... spermatozoa). Consequently, they are associated with two amnions, two chorions, and two placentas, which may (65%) or may not (35%) be fused. Dizygotic twins are only as closely genetically related as any two siblings. ...
... spermatozoa). Consequently, they are associated with two amnions, two chorions, and two placentas, which may (65%) or may not (35%) be fused. Dizygotic twins are only as closely genetically related as any two siblings. ...
earthworm_dissection_questions
... system. The earthworm takes in a mixture of soil and organic matter through its mouth, which is the beginning of the digestive tract. The mixture enters the pharynx, which is located in segments 1–6. The esophagus, in segments 6–13, acts as a passageway between the pharynx and the crop. The crop st ...
... system. The earthworm takes in a mixture of soil and organic matter through its mouth, which is the beginning of the digestive tract. The mixture enters the pharynx, which is located in segments 1–6. The esophagus, in segments 6–13, acts as a passageway between the pharynx and the crop. The crop st ...