Nervous System in Cnidarians

Reynolds School District
Reynolds Jr.-Sr. High School
Weekly Lesson Plans and assignments
Week: 3/17– 3/21
Teacher: Foore
Subject: Sci Trends
Grade: 11
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Monday
Academic Standard #
Nature of Science
Objective # pg 673-685
Reasoning and Analysis 1.1 – 1.3
Processes, Procedures and Tools 2.1 and 2.2
Systems, Models and Patterns 3.1 – 3.3
Biological 1.1 – 2.2
Lesson Objective: Ch- 33 Sponge and Cnidarians
Resources: Text Book
Details: Chapter 33 Sec 1
Assignment: sec. 1 rev.
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Tuesday
Academic Standard #
Nature of Science
Objective # pg 673-685
Reasoning and Analysis 1.1 – 1.3
Processes, Procedures and Tools 2.1 and 2.2
Systems, Models and Patterns 3.1 – 3.3
Biological 1.1 – 2.2
Lesson Objective: Ch- 33 Sponge and Cnidarians
Resources: Text Book
Details: Chapter 33 Sec 2
Assignment: sec. 2 rev.
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Wednesday
Academic Standard #
Nature of Science
Objective # pg 673-685
Reasoning and Analysis 1.1 – 1.3
Processes, Procedures and Tools 2.1 and 2.2
Systems, Models and Patterns 3.1 – 3.3
Biological 1.1 – 2.2
Lesson Objective: Ch- 33 Sponge and Cnidarians
Resources: Text Book
Details: Chapter 32 Sec 2
Assignment: sec. 3 rev.
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Thursday
Academic Standard #
Nature of Science
Objective # pg 673-685
Reasoning and Analysis 1.1 – 1.3
Processes, Procedures and Tools 2.1 and 2.2
Systems, Models and Patterns 3.1 – 3.3
Biological 1.1 – 2.2
Lesson Objective: Ch- 33 Sponge and Cnidarians
Resources: Text Book
Details: Chapter rew. pg 667
Assignment
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Friday
Academic Standard #
Nature of Science
Objective # pg 673-685
Reasoning and Analysis 1.1 – 1.3
Processes, Procedures and Tools 2.1 and 2.2
Systems, Models and Patterns 3.1 – 3.3
Biological 1.1 – 2.2
Lesson Objective: Ch- 33 Sponge and Cnidarians
Resources: Text Book
Details: lab dissect sponge
Assignment
CHAPTER 33
Section 1: Porifera
• The phylum Porifera is made up of __________________.
• Sponges are _______________ invertebrates that have no true tissues
or organs. The simplest sponges are shaped like hollow cylinders.
• The body wall of a sponge is composed of two layers of cells that are
separated by a jellylike substance called ____________________.
• Choanocytes in the interior layer draw water through the __________
that penetrate the body wall. The water leaves through the _________.
• The body is supported by a skeleton made of ___________________,
________________________, or both.
Feeding and Digestion in Sponges
• Sponges feed by filtering small organisms and organic matter out of
the water that passes through their body. This is called ____________.
• Nutrients are distributed through the body by ___________________,
cells which crawl about within the body wall.
Reproduction in Sponges
• Sponges can reproduce both ________________________________.
• They reproduce asexually through:
• Producing buds or _________________________.
• ___________________________ of missing parts
• They reproduce ____________ through the joining of egg and sperm.
• Most sponges are__________________________, which can produce
both egg and sperm.
Section 2: Cnidaria and Cnidocytes
Body plan in Cnidaria
• Animals in the phylum Cnidaria are ________________symmetrical
aquatic invertebrates that are more complex than the sponges. They
have tissues and a few simple organs.
• The cnidairan body is either a sessile ______or a swimming________.
Some cnidarians alternate between both types during their life cycles.
• The body of a cnidarian consists of two cell layers:
– an outer _____________________
– an inner _____________________
• The layers are separated by the_____________________.
• The ________________________cavity has a single opening
(the mouth) surrounded by____________________________.
Feeding and Defense in Cnidarians
• Cnidarians have cells called___________________________.
• Each cnidocyte contains a _____________________________.
• When a cnidocyte is stimulated, its nematocyst ejects a filament that
can __________________________or ensnare prey.
Nervous System in Cnidarians
• The cnidarian nervous system is a diffuse web of interconnected nerve
cells called a_________________________________.
Classifications
The four classes of cnidarians are:
• Class Hydrozoa
– This class includes Obelia, ________________, and the hydra.
– ____________may live as polyps, medusae, or mixed colonies.
• Class Cubozoa
– This class includes____________________________.
– Cubozoans spend most of their lives as medusae.
• Class Scyphozoa
– This class includes____________________________.
– Scyphozoans spend most of their lives as medusae.
• Class Anthozoa
– This class includes sea________________________________.
– Anthozoans live only as polyps.
Phylum Ctenophora
• Animals in the phylum Ctenophora are known as ctenophores and
often called_____________________________________.
• Ctenophores move through the water by beating the ______________
that occur in eight rows on the outside of their body.
• Ctenophores capture prey with a sticky substance secreted by their
_______________________________.
• An _________________________at one end of the body enables
ctenophores to sense their orientation in the water.
• Most ctenophores are__________________________________.
• Many ctenophores have________________________________.