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Thread: Question for evolutionists

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    Default Question for evolutionists

    Ok. Your body has a circulatory system. This is used to move oxygen rich blood cells through every part of your body. Now, here's a question for you. A circulatory system is useless without blood. Also, blood has no reason to exist without one. So which came first? Blood or our circulatory system? The answer is neither. They were created at the same time. There is no other rational explanation.

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    That can't be true, your brain has clearly been deprived of oxygen for decades.

    But also you can move oxygen through the body without one. Insects, mollusks, etc.
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    Quote Originally Posted by Grugore View Post
    Ok. Your body has a circulatory system. This is used to move oxygen rich blood cells through every part of your body. Now, here's a question for you. A circulatory system is useless without blood. Also, blood has no reason to exist without one. So which came first? Blood or our circulatory system? The answer is neither. They were created at the same time. There is no other rational explanation.
    Like a sponge, or only a few cell layers, such as the jellyfish? They do not have a circulatory system.
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    Quote Originally Posted by kudzu View Post
    Like a sponge, or only a few cell layers, such as the jellyfish? They do not have a circulatory system.
    Neither one of which is a warm-blooded mammal. The question still remains. Blood could not evolve without a circulatory system. A circulatory system could not evolve without blood to circulate. It's a catch-22. You cant have one without the other, and they could not evolve separately.

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    Quote Originally Posted by Grugore View Post
    Neither one of which is a warm-blooded mammal. The question still remains. Blood could not evolve without a circulatory system. A circulatory system could not evolve without blood to circulate. It's a catch-22. You cant have one without the other, and they could not evolve separately.
    Except for the circulatory systems that exist without blood that you just keep ignoring, because you likely failed high school biology.
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    Quote Originally Posted by Quetzalcoatl View Post
    That can't be true, your brain has clearly been deprived of oxygen for decades.

    But also you can move oxygen through the body without one. Insects, mollusks, etc.
    If that is true, then why was there a need to develop a circulatory system? We're discussing warm-blooded mammals here. Not insects.

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    Quote Originally Posted by Grugore View Post
    If that is true, then why was there a need to develop a circulatory system? We're discussing warm-mammals here. Not insects.
    That's a fundamentally flawed question. Evolution does not occur because of need.
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    Quote Originally Posted by Quetzalcoatl View Post
    Except for the circulatory systems that exist without blood that you just keep ignoring, because you likely failed high school biology.
    Stay on topic. We're discussing warm-blooded mammals. Can you explain how our blood and circulatory system supposedly evolved? The question is still valid found species that don't use blood. A circulatory system needs something to circulate before it has any excuse to evolve.

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    Quote Originally Posted by Grugore View Post
    Ok. Your body has a circulatory system. This is used to move oxygen rich blood cells through every part of your body. Now, here's a question for you. A circulatory system is useless without blood. Also, blood has no reason to exist without one. So which came first? Blood or our circulatory system? The answer is neither. They were created at the same time. There is no other rational explanation.
    Circulatory System Variation in Animals
    https://courses.lumenlearning.com/wm...on-in-animals/

    The circulatory system varies from simple systems in invertebrates to more complex systems in vertebrates. The simplest animals, such as the sponges (Porifera) and rotifers (Rotifera), do not need a circulatory system because diffusion allows adequate exchange of water, nutrients, and waste, as well as dissolved gases, as shown in Figure 1a. Organisms that are more complex but still only have two layers of cells in their body plan, such as jellies (Cnidaria) and comb jellies (Ctenophora) also use diffusion through their epidermis and internally through the gastrovascular compartment. Both their internal and external tissues are bathed in an aqueous environment and exchange fluids by diffusion on both sides, as illustrated in Figure 1b. Exchange of fluids is assisted by the pulsing of the jellyfish body.

    For more complex organisms, diffusion is not efficient for cycling gases, nutrients, and waste effectively through the body; therefore, more complex circulatory systems evolved. Most arthropods and many mollusks have open circulatory systems. In an open system, an elongated beating heart pushes the hemolymph through the body and muscle contractions help to move fluids. The larger more complex crustaceans, including lobsters, have developed arterial-like vessels to push blood through their bodies, and the most active mollusks, such as squids, have evolved a closed circulatory system and are able to move rapidly to catch prey. Closed circulatory systems are a characteristic of vertebrates; however, there are significant differences in the structure of the heart and the circulation of blood between the different vertebrate groups due to adaptation during evolution and associated differences in anatomy. Figures 2 and 3 illustrates the basic circulatory systems of some vertebrates: fish, amphibians, reptiles, and mammals.

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    Quote Originally Posted by Grugore View Post
    Stay on topic. We're discussing warm-blooded mammals. Can you explain how our blood and circulatory system supposedly evolved? The question is still valid found species that don't use blood. A circulatory system needs something to circulate before it has any excuse to evolve.
    Learn to do internet searches pard.

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    Quote Originally Posted by Quetzalcoatl View Post
    That's a fundamentally flawed question. Evolution does not occur because of need.
    Why else would it evolve?

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    Quote Originally Posted by Grugore View Post
    Why else would it evolve?
    Random point mutations, Jeebus you're unprepared for this.

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    Quote Originally Posted by Grugore View Post
    If that is true, then why was there a need to develop a circulatory system? We're discussing warm-blooded mammals here. Not insects.
    Clearly you have no concpet of what evolution is or how it functions in a biological system.

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    Quote Originally Posted by Grugore View Post
    If that is true, then why was there a need to develop a circulatory system? We're discussing warm-blooded mammals here. Not insects.
    Organism evolved due to their environments, they mutated to adapt.

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    Quote Originally Posted by Fentoine Lum View Post
    Random point mutations, Jeebus you're unprepared for this.
    Yeah and this is basic high school biology.

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